If f(x) = 5 + 3x and g(x) = 5 - 9x, find f(g(2)).

Answers

Answer 1

If the function f(x) = 5 + 3x and g(x) = 5 - 9x. The value of f(g(2))  is -34

The given functions are

f(x) = 5 + 3x and g(x) = 5 − 9x.

a. We plug-in 2 in the function g(x) and then the obtained image in the function

f(x)g(2) = 5 − 9 × 2

           = 5 - 18

           = -13

f(g(2)) = f(-13)

        = 5 + 3 × (−13)

        = 5 - 39

        = -34

b. We find the composite function by replacing x in f(x)  by  

g(x) f(g(x)) = 5 + 3g(x)

                = 5 + 3 × (5−9x)

                = 5 + 15 − 27x

f(g(x)) = 20 − 27x

f(g(2)) = 20 − 27 × 2

         = 20 − 54

         = -34

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Related Questions

If a1 = 3, an+1 = 2an, find a2.​

Answers

Answer:

a2=0

Step-by-step explanation:

a=2

n=0.5

2a=0

2.2=0

4=0

2a=0

What is the horizontal asymptote of f/x )= 4 x?

Answers

The given equation of the horizontal asymptote is y=0

Because there is not a rational expression so there is no horizontal asymtotes.The given equation would be linear because degree of given function is 1.

what is an Asymptote?

An asymtote is a line being approached by a curve but never touching the curve at any finite distance.It is a line that the graph approaches as either x or y in positive or negative infinity.

How do you find horizontal asymptotes?

The horizontal asympototes of a function can be determined by looking at the degree of the numerator and denominator.if we say N is the degree of numerator and Dis the degree of denominator.So it will be N<D.Then horizontal asymptotes will be y=0

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State a and d for the arithmetic sequence below:
1, 3, 5, 7...

a=

d=

Answers

Answer:a,9 b,11

Step-by-step explanation:

Where are the asymptotes for the following function located?
f (x) = startfraction 7 over x squared minus 2 x minus 24 endfraction

Answers

The asymptotes for the given function f(x) = 7/(x^2-2x-24) are located at

x = -3 and x = 8.

The asymptotes of a function are the lines that the graph approaches, but never touches as it continues to infinity. In the given function, f(x) = 7/(x^2-2x-24), the asymptotes are located at x = -3 and x = 8.

To find the asymptotes of a function, you first need to factor the denominator of the function. In this case, the denominator is[tex]x^2-2x-24,[/tex]which can be factored into (x+3)(x-8). This means that there are two potential zeroes in the denominator, x=-3 and x=8. These two points are the two asymptotes of the graph of the given function.

To explain further, the two asymptotes divide the x-axis into three intervals. On the interval (-infinity, -3), the graph of the function will approach negative infinity as x approaches -3 from the left. On the interval (-3, 8), the graph of the function will approach positive infinity as x approaches 8 from the right. On the interval (8, infinity), the graph of the function will approach negative infinity as x approaches 8 from the right.

In summary, the asymptotes for the given function f(x) = 7/(x^2-2x-24) are located at x = -3 and x = 8.

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Graph the line through the given point with the given slope.

(0, 5), m = - 5

(basically what coordinate points would there be?)

Answers

Answer:

The equation would be

y =-5x + 5

Step-by-step explanation:

Use the x of 0 from the point given (0,5)

Use the y of 5 from the point given (0,5)

Use the slope that is given: -5

Use all of the above to solve for the y-intercept (b).

y = mx + b

5 = -5(0) + b

5 = 0 + b

5 = b

y =mx + b

y = -5x + 5

In the graph, the line crosses the y axis at (0,5) . The is the y -intercept or the "b" of the equation.

From that points move down 5 and one to the right.  This is the slope.  Once we have two points we can draw a line.

What is domain simple answer?

Answers

A domain is a component of the nomenclature used in web addresses to identify your website or a particular page of your website online.

What is domain ?

A function's authorized range of values is known as its domain. For a function like f, this set contains of the x values (x). The set of those values represents the possible range of values that a function can take as input. The function's response to our x value entry is this group of values.

here ,

A domain is typically a sphere of knowledge or an area under one's control.

Users find it much easier to recall and search for online because it is a string of text linked to a website's numerical IP address.

Both the internet's architecture and the way a company's network resources are set up fall under the umbrella term "domain."

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I need the answer to the second question in the picture, but can you also say if the one above it is correct or not?

Answers

The area of shaded region of standard normal distribution is 0.1292

what is standard normal distribution?

A unique type of normal distribution with a mean of 0 and a standard deviation of 1 is known as the standard normal distribution, or z-distribution.

Any normal distribution can be transformed into the common normal distribution by converting the individual values into z-scores. Z-scores indicate the number of standard deviations that each value in a z-distribution is from the mean.

solution:

For - 3.39 to 0

The standard deviation value is : 0.00035

For 0 to 1.13

The standard deviation value is : 0.3708

Then for - 3.39 to + 1.13 :

The area of the given shaded area is 0.1292

Hence,the area of shaded region of standard normal distribution is 0.1292

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Find the distance between two numbers on a number line -4 7/12 and -3 1/6

Answers

Answer: -17/12 or -1 5/12 or 1 5/12

Step-by-step explanation:

convert both equations into improper fractions

− 55/12 - (-19/6)

-55/12+19/6

find the common factor of the denominators

-55/12 + 38/12

-17/12

-1 5/12

12 pencils cost 1.80 pounds. How many pencils can be bought for 6 pounds?

Answers

Answer:

Step-by-step explanation:i think to answer is either 90p or 9p

Answer:

90p or 9p

Step-by-step explanation:

Clark's rule is a formula used to determine pediatric doses of over the counter medicine.
The formula says
The weight of a child divided by 150 multiplied by the adult dose is the same as the child dose
if an adult dose of acetaminophen is 1,000 mg and a child weighs less than 90 pounds, what is
the recommended range of doses?
A. x≤ 600
B. x ≥ 600
C. 500 D. 500 ≤x≤ 600

Answers

500 ≤x≤ 600  is the recommended range of doses. Typically, a phase I or early phase II clinical trial involves dose range.

How to calculate doses ?

To solve this problem using Clark's rule, we need to determine the range of pediatric doses for a child who weighs less than 90 pounds and for whom the adult dose is 1,000 mg.

A mathematical formula known as Clark's rule is used in medicine to determine the right dosage of medication for patients aged 2 to 17 depending on their weight and the recommended adult dose.

First, we can use the formula provided to calculate the child dose:

Child dose = (Weight of child / 150) * Adult dose

Since the weight of the child is less than 90 pounds, we can set the weight of the child to the minimum value in the range, which is 50 pounds. This gives us:

Child dose = (50 / 150) * 1000 mg

= 333.33 mg

Next, we can set the weight of the child to the maximum value in the range, which is 89 pounds. This gives us:

Child dose = (89 / 150) * 1000 mg

= 593.33 mg

Therefore, the recommended range of doses for a child who weighs less than 90 pounds and for whom the adult dose is 1,000 mg is 500 mg ≤ x ≤ 600 mg.

So, the correct answer is D. 500 ≤x≤ 600.

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Classifying Triangles Maze! Directions: Glven each set of side lengths, determine if the triangle is acute. obluse, night, or not a triangle. Use your solutions to navigate through the moze End! Start! Acute 6,10,17 Obtuse 26, 28, 38 Nota a 10, 17, 23 Obtuse Not a Right Not a A Obtuse Acute Right 13, 18, 29 Not a A 9,13, 20 Acute 15,19,25 Not A 4, 11, 13 Acute Right Obtuse Not a A Right Acute Obtuse 16,16, 22 Nota A 4,7,8 Acute 20, 21, 29 Obtuse 3,16,25 Obtuse Obtuse Right Not a Δ Not a Acute Not a A 5, 16, 24 Acute 19,24,39 Right 9,40,41 Obtuse 12, 35, 37 Right Not a A Acute Not a A Acute Right Acute 7,34,45 Not a 4,13,16 Right 23, 30, 37 Obtuse 14, 21, 37 on 1 Gino Won A Things Algebra LLC. 2016

Answers

Classifying triangles maze's path formed from the starting point is 3 - 10 - 17, 9 - 13 - 20, 4 - 7 - 8, 20 - 21 - 29, 15 - 19 - 25, 26 - 28 - 38, 4 - 11 - 13, 3 - 16 - 25, 12 - 35 - 37, 23 - 30 - 37, 9 - 40 - 41, 19 - 24 - 39, 16 - 16 - 22, and 13 - 18 - 29.

The full question is in the attachment. According to the Pythagorean theorem if there are three sides a, b, and c, where a ≤ b < c

a² + b² < c² an obtuse triangle is formeda² + b² = c² a right triangle is formeda² + b² > c² an acute triangle is formed

But if a + b < c then a triangle cannot be formed

From point start

3 - 10 - 17
3 + 10 = 16 < 17
not a triangle9 - 13 - 20
9 + 13 = 22 > 20 a triangle formed
9² + 13² = 81 + 169 = 250
20² = 400
9² + 13² < 20²
Obtuse4 - 7 - 8
4 + 7 = 11 > 8 a triangle formed
4² + 7² = 16 + 49 = 65
8² = 64
4² + 7² > 8²
Acute20 - 21 - 29
20 + 21 = 41 > 29 a triangle formed
20² + 21² = 400 + 441 = 841
29² = 841
20² + 21² = 29²
Right15 - 19 - 25
15 + 19 = 34 > 25 a triangle formed
15² + 19² = 225 + 361 = 586
25² = 625
15² + 19² < 25²
Obtuse26 - 28 - 38
26 + 28 = 54 > 38 a triangle formed
26² + 28² = 676 + 784 = 1,460
38² = 1,444
26² + 28² > 38²
Acute4 - 11 - 13
4 + 11 = 15 > 13 a triangle formed
4² + 11² = 16 + 121 = 140
13² = 169
4² + 11² < 13²
Obtuse3 - 16 - 25
3 + 16 = 19 < 25
not a triangle12 - 35 - 37
12 + 35 = 47 > 37 a triangle formed
12² + 35² = 144 + 1,225 = 1,369
37² = 1,369
12² + 35² = 37²
Right23 - 30 - 37
23 + 30 = 53 > 37 a triangle formed
23² + 30² = 529 + 900 = 1,429
37² = 1,369
23² + 30² > 37²
Acute9 - 40 - 41
9 + 40 = 49 > 41 a triangle formed
9² + 40² = 81 + 1,600 = 1,681
41² = 1,681
9² + 40² = 41²
Right19 - 24 - 39
19 + 24 = 43 > 39 a triangle formed
19² + 24² = 361 + 576 = 937
39² = 1,521
19² + 24² < 39²
Obtuse16 - 16 - 22
16 + 16 = 32 > 22 a triangle formed
16² + 16² = 256 + 256 = 512
22² = 484
16² + 16² > 22²
Acute13 - 18 - 29
13 + 18 = 31 > 29 a triangle formed
13² + 18² = 169 + 324 = 493
29² = 841
13² + 18² < 29²
ObtuseEndpoint

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Is 3x² 4x 15 a polynomial in one variable?

Answers

The  equation is 3x² - 4x + 15 is polynomial in one variable.

What are polynomial in one variable?

An algebraic expression with one or more terms and a non-zero coefficient is called a polynomial. A polynomial is an expression composed of variables, coefficients, and constants connected by a mathematical operator. A polynomial is an expression connected by mathematical operations like addition, subtraction, multiplication, and division. An algebraic expression with only one variable is called a polynomial in one variable.

Given equation 3x² - 4x + 15

An algebraic expression with only one variable is a polynomial in one variable.

some examples of one variable polynomial

x + 2

y+ 5

x² + ax + b

ax³ + bx + c

all the equations that contain only 1 variables are  polynomial in one variable.

Hence the expression is polynomial in one variable.

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Why is 1 not a square number?

Answers

According to square numbers , 1 is a square number while 2 is not .

What does Squaring mean ?

In mathematics, a square is the result of multiplying a number by itself. The verb "to square" is used to denote this operation. Squaring is the same as raising to the power 2, and is denoted by a superscript 2; for instance, the square of 3 may be written as 32, which is the number 9.

When you multiply an integer (a “whole” number, positive, negative or zero) times itself, the resulting product is called a square number, or a perfect square or simply “a square.” So, 0, 1, 4, 9, 16, 25, 36, 49, 64, 81, 100, 121, 144, and so on, are all square numbers.

Thus , 1 is a square number while 2 is not .

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I need to know the unit price for both a and b and what’s the better buy

Answers

Answer:

Brand A Forks $0.08, Brand B Forks $0.06, Better Buy is Brand B

Step-by-step explanation:

Unit price is price per unit (in this case, forks)

You need to find the $ for 1 fork for Brand A and B, since they have different unit prices.

total price/units = price/unit

Brand A: $1.97/25 forks = $0.0788 (rounded up is $0.08)

Brand B: $2.98/48 forks = $0.06208 (rounded up is $0.06)

Better brand is Brand B because it is cheaper.

How do you know what method SSS SAS ASA AAS to use when proving triangle congruence?

Answers

We can find out which method SSS, SAS, ASA, and AAS can be used to prove similarity by observing what three components are given.

If it is given that three sides are equal then we will use side side side(SSS) postulate.

If it is given that two sides and one angle is given then we will use the side angle side(SAS) postulate.

If two angles and one side is given then we will use the angle side angle (ASA) postulate.

To find which postulate will suit for that we will have to observe which components are given that are equal.

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Algebra II 5.02: Solve Radical Equations

Answers

Radical Equations

Step 1

To demonstrate how to solve a radical equation, let's use the following equation as an example:

Evaluate the quantity of x cubed minus 2x squared plus 3x minus 7 end quantity divided by the quantity of x minus 1 end quantity period.

Answers

Our final resulting answer will be -5.

To calculate the remainder, first divide the polynomials.

Set up the polynomials to be divided. if there is not a term for every exponent, insert one with a value of 0.

[tex]\sqrt[x-1]{x^{3}-2x^{2} +3x-7 }[/tex]

Divide the highest order term in the dividend [tex]x^{3}[/tex] by the highest order term in divisor x.

Multiply the new quotient term by the divisor.

The expression needs to be subtracted from the dividend, so change all the signs [tex]x^{3}[/tex]+[tex]x^{2}[/tex].

After changing the signs, add the last dividend from the multiplied polynomials to find the new dividend.

Pull the next terms from the original dividend down into the current dividend.

Divide the highest order term in the dividend -[tex]x^{2}[/tex] by the highest order term in divisor x.

Multiply the new quotient term by the divisor.

The expression needs to be subtracted from the dividend, so change all the signs in -[tex]x^{2}[/tex]-x.

After changing the signs, add the last dividend from the multiplied polynomial to find the new dividend.

Pull the next terms from the original dividend down into the current dividend.

Divide the highest order term in the dividend 2x by the highest order in divisor x.

Multiply the new quotient term by the divisor.

The expression needs to be subtracted from the dividend, so change all the signs in -2x+2.

After changing the signs, add the last dividend from the multiplied polynomial to find the new dividend.

The final answer is the quotient plus the remainder over the divisor.

[tex]x^{2}[/tex]-x+2-[tex]\frac{5}{x-1}[/tex]

Since the last term in the resulting expression is a fraction, the numerator of the fraction is the remainder.

So, our final answer will be -5.

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passes through (6,3) and (14,-5)

Answers

Answer:

Slope: m = (y2 - y1)/(x2 - x1) = (-5 - 3)/(14 - 6) = -8/8 = -1

The equation of the line is y = -x + b

Substitute (6,3) into the equation:

3 = -6 + b

b = 9

Therefore, the equation of the line is y = -x + 9

Step-by-step explanation:

g what word is used to say the probability of an adverse outcome? question 12 options: risk variance random statistics none of the above

Answers

Risk is used to say the probability of an adverse outcome.

Option (a) (Risk) is the correct choice.

Through risk assessment, businesses, governments, projects, and investors may determine the likelihood that a bad occurrence will have a detrimental effect on their operations.

Risk assessment is crucial for figuring out the value of a particular project or investment and the appropriate process(es) to manage such risks.

Different methods may be used to evaluate the risk and reward tradeoff of a possible investment opportunity using the information provided by risk analysis.

A risk analyst begins by determining what may go wrong.

These drawbacks must be compared to a probability meter that assesses the chance that the event will occur.

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The correct question may be:

What word is used to say the probability of an adverse outcome?

(a) risk

(b) variance

(c) random statistics

(d) None of the above

1800 ounces of a radioactive substance are stored in a radioactive container.
ounces, of the substance that is left after t years can be modeled by the equation y = 1800e-0.00052t
where y is the amount of the substance left after t years.
Approximately how many years will it take until 80 ounces of this substance remains?

Answers

According to the given statement 2.622 years will it take until 80 ounces of this substance remains.

How much does one ounce weigh?

Use a test tube holder that has an ounce marker or can be converted quickly to ounces (like cups). As you take the measuring cup from the ingredient, let it overflow. You may try and reduce measurement afterwards. Use a knife to level the measuring cup.

Briefing:

The equation may be used to predict how much of the chemical is still present after t years, measured in ounces.

y=1800e -0.00052t

In the equation above, we substitute y = 80 ounce to obtain the time.

80= 1800e -0.00052t

80/1800=e -0.00052t

2/45= e -000.52t

Considering both ends of the aforementioned equation

In(2/45)= In(e -000.52t)

In(2)-In(45)= In(e -000.52)

0.3010-1.653= -000.52t

-1.352= -000.52t

dividing by 000.52 on both side

1.352/000.52= t

t= 2.622 years

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Determine the domain and range for the function below.

Answers

Answer:

Domain: (-∞, ∞); Range: [1, ∞)

Step-by-step explanation:

Domain is the set/interval of x-values that the function spans while the range is the set or interval of y-values that the function spans.

Domain

We can see that the arrows point towards negative and positive infinity for x and also see there are no holes or asymptotes for this graph. Therefore, the domain is (-∞, ∞) or {x | x is any real number}

Range

We can see that the arrows both point towards infinity for y-values and that the lowest y-value this graph touches is y = 1 (inclusive, meaning this y-value is included in the range). Thus, the range is [1, ∞) or {y | y ≥ 1}

A new bank customer with $2,500 wants to open a money market account. The bank is offering a simple interest rate of 1.6%.
a. How much interest will the customer earn in 20 years?
b. What will the account balance be after 20 years?

Answers

a) The customer will earn $800 as interest in 20 years.

b) The account balance after 20 years will be - $ 3300.

Principle = $2500

Rate of simple interest = 1.6%

Time = 20 yrs

The simple interest is expressed as :

   S.I = [tex]\frac{PRT}{100}[/tex]

⇒ S.I = [tex]\frac{2500 * 1.6 * 20}{100}[/tex]

⇒ S.I = 25 * 20 *1.6

⇒ S.I = 800

The simple interest after 20 years = $800

The account balance after 20 years is -

= principle + simple interest

= 2500 + 800

=  3300

a) The customer will earn $800 as interest in 20 years.

b) The account balance after 20 years will be - $ 3300.

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What are the 4 tests of congruency?

Answers

The 4 tests of congruency are:

Side - Side - Side (S.S.S. congruency)

Side - Angle - Side (S.A.S. congruency)

Angle - Angle - Side (A.A.S congruency)

Right - Hypotenuse - Side (R.H.S. congruency)

Tests of congruency:

Side - Side - Side (S.S.S. congruency)

If three sides of one triangle are equal to three sides of another triangle, the triangles are congruent.

Side - Angle - Side (S.A.S. congruency)

If two sides and the included angle of one triangle are equal to the corresponding sides and angle of another triangle, the triangles are congruent.

Angle - Angle - Side (A.A.S congruency)

If two angles and the non-included side of one triangle are equal to the corresponding angles and side of another triangle, the triangles are congruent.

Right - Hypotenuse - Side (R.H.S. congruency)

If the hypotenuse and one leg of one right-angled triangle are equal to the corresponding hypotenuse and leg of another right-angled triangle, the two triangles are congruent.

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9. Find the measure of angle B. Round to the nearest tenth. (show work)

Answers

The measure of angle 55 degrees Celsius

What is the explanation?

In order to get the measure of the unknown angle A, we are given a right-angled triangle with two known side lengths for the perpendicular and base.

To do that, we may use the tan formula, which uses the two provided side lengths.

the nearest tenth:

To get the solution in this case, we must apply the tan ratio.

tan = Adjacent or Opposite

tan = Opposite / Adjacent

Given: Opposite equals 4, adjacent equals 13.

Given: Adjacent = 13, opposite = 12.

tan θ = 12/13

θ = tan^-1 (12/13)

55 degrees.

55 degrees, please.

The measure of angle 55 degrees Celsius

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Find the missing number in this proportion. ?/8=16/64
A.0
B.1
C.2
D.3

Answers

Answer: C. 2

Evaluation:

We are required to find the equivalent fraction here. When simplifying 16/64, we divide both sides by 16:

16 ÷ 16 = 1

64 ÷ 16 = 4

16/64 in its simplest form is 1/4. When we multiply both the numerator and denominator by 2, we will find that:

1/4 = 2/8

Verification:

To verify this, we can multiply both parts of the fraction by 8:

2 × 8 = 16

8 × 8 = 64

Hence, we know our answer is correct.

What mode of observation is 5'7 8?

Answers

The mode for a particular set of observations is 5 since it occurs the majority of the time.

What is mode?

The mode formula is described in statistics as the formula for calculating the mode of a given collection of data. The value that occurs most frequently in a particular set is referred to as the mode, and the mode differs across grouped and ungrouped data sets. The mode may be calculated quite easily. Put all of the numbers in a given set in order, either lowest to highest or highest to lowest, and then count how many times each number appears in the set. The mode is the one that appears the most.

Here,

given set of observation:

5, 7, 8, 5, 7, 6, 9, 5, 10, 6

Mode is the number which occurs the highest time.

So here 5 occurs the highest times(3 times).

So,5 is the mode.

The mode for given set of observation is 5 as it occurs most time.

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Given:
CD CB CA CE   and
Prove:
   A E
You may use any style proof you prefer.

Answers

The alternate angles between two parallel lines are equal, therefore, ∠ A = ∠ E.



What is rectangle?

An enclosed 2-D shape called a rectangle has four sides, four corners, and four right angles (90°). A rectangle has equal and parallel, opposite sides. Since a rectangle is a two-dimensional form, it has two dimensions: length and width. The rectangle's longer side is its length, while its shorter side is its breadth.

Given:

CD ≅ CB and CA ≅ CE

As you can see from the diagram, on joining BE and AD the figure will represent a rectangle ABED because the diagonals of the rectangle are equal and bisect each other.

Thus, DE || AB (Rectangle property)

∠ A = ∠ E, because the alternate angle of parallel lines is equal.

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How do you determine the relationship between the volume of a rectangular prism and pyramid?

Answers

The relationship between the volume of a rectangular prism and pyramid is defined as that the pyramid takes up 1/3 of the volume of a prism.

Here we need to identify  the relationship between the volume of a rectangular prism and pyramid.

As we all know that the volume of rectangle prism is written as,

=> Volume of a prism = (area of base) * height

Now, let us consider the volume of a pyramid that the pyramid takes up 1/3 of the volume of a prism when their bases and height are equal.

So, here the volume of a pyramid is 1/3 multiplied by the volume of a prism.

Then we get the volume of pyramid is written as,

Volume of a pyramid = 1/3 (area of the base) * height

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I can't seem to figure out what it means by characteristics for these equations, It might be more simple than I think, but I honestly don't know.

Answers

Explanation:

Characteristics about an equation are slope, intercepts, and things like that.

Part D of each problem is just referring to part a, b, and c

So, Part D is basically asking you to show your work, to explain slope-intercept equation, make observations about the problem, etc.

Hope I helped! :)

2. The total surface area of a square based pyramid is 900 sq. cm. If the lateral surface area of the pyramid is three times the base area, find the length of the base. Also find the volume of the pyramid.​

Answers

Answer:

Length of the base = 15 cm

Volume = 1125√2 cm³ = 1590.99 cm³ (2 d.p.)

Step-by-step explanation:

[tex]\boxed{\begin{minipage}{6.6cm}\underline{Lateral Surface Area of a square pyramid}\\\\$LSA=a \sqrt{a^2+4h^2}$\\\\where:\\\phantom{ww}$\bullet$ $a$ is the base edge \\\phantom{ww}$\bullet$ $h$ is the height\\\end{minipage}}[/tex]

[tex]\boxed{\begin{minipage}{6.6cm}\underline{Base Area of a square pyramid}\\\\$BA=a^2$\\\\where:\\\phantom{ww}$\bullet$ $a$ is the base edge \\\end{minipage}}[/tex]

If the lateral surface area (LSA) of the pyramid is three times the base area (BA):

[tex]\implies a \sqrt{a^2+4h^2}=3a^2[/tex]

Rearrange the equation to isolate h²:

[tex]\implies \sqrt{a^2+4h^2}=3a[/tex]

[tex]\implies (\sqrt{a^2+4h^2})^2=(3a)^2[/tex]

[tex]\implies a^2+4h^2=9a^2[/tex]

[tex]\implies 4h^2=8a^2[/tex]

[tex]\implies h^2=2a^2[/tex]

[tex]\boxed{\begin{minipage}{6.6cm}\underline{Total Surface Area of a square pyramid}\\\\$SA=a^2+a \sqrt{a^2+4h^2}$\\\\where:\\\phantom{ww}$\bullet$ $a$ is the base edge \\\phantom{ww}$\bullet$ $h$ is the height\\\end{minipage}}[/tex]

Given:

SA = 900 cm²h² = 2a²

Substitute these values into the formula for the total surface area and solve for a:

[tex]\implies a^2+a\sqrt{a^2+4(2a^2)}=900[/tex]

[tex]\implies a^2+a\sqrt{a^2+8a^2}=900[/tex]

[tex]\implies a^2+a\sqrt{9a^2}=900[/tex]

[tex]\implies a^2+a(3a)=900[/tex]

[tex]\implies a^2+3a^2=900[/tex]

[tex]\implies 4a^2=900[/tex]

[tex]\implies a^2=225[/tex]

[tex]\implies a=15[/tex]

Therefore, the length of the base of the square based pyramid is:

a = 15 cm

To find the height (h), substitute the found value of a into the formula for h² and solve for h:

[tex]\implies h^2=2(15)^2[/tex]

[tex]\implies \sqrt{h^2}=\sqrt{2(15)^2}[/tex]

[tex]\implies h=\sqrt{2}\sqrt{(15)^2}[/tex]

[tex]\implies h=15\sqrt{2}[/tex]

Therefore, the height of the square based pyramid is:

h = 15√2 cm

[tex]\boxed{\begin{minipage}{5cm}\underline{Volume of a square pyramid}\\\\$V=\dfrac{1}{3}a^2h$\\\\where:\\\phantom{ww}$\bullet$ $a$ is the base edge \\\phantom{ww}$\bullet$ $h$ is the height\\\end{minipage}}[/tex]

Given:

a = 15h = 15√2

Substitute the values into the formula and solve for volume:

[tex]\implies V=\dfrac{1}{3}(15)^2 \cdot 15\sqrt{2}[/tex]

[tex]\implies V=\dfrac{225}{3} \cdot 15\sqrt{2}[/tex]

[tex]\implies V=75\cdot 15\sqrt{2}[/tex]

[tex]\implies V=1125\sqrt{2}[/tex]

[tex]\implies V=1590.99[/tex]

Therefore, the volume of the square based pyramid is:

1590.99 cm³ (2 d.p.)
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