In case whereby You launch a toy rocket from a height of 5 feet with the height h, in feet of the rocket t seconds after taking off is given by the formula h = -3t2 + 14t + 5, then the value of t will be 4.67 secs.
How can the values of t be calculated?
The giving equation is h = -3t2 + 14t + 5
where the height h is been given as 5 feet, then we can substitute the value of the height they the expression can be simplified as
5 = -3t^2 + 14t + 5
Then this equation can be re arranged as :
-3t^2 + 14t + 5 - 5=0
This can as well be expressed as
-3t^2 + 14t = 0
t(-3t + 14)= 0
Then t= 0 and -3t + 14=0
t=14/3 = 4.67 secs
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How can you justify that the function is
exponential?
Answer:
Since the y axis is increasing at an exponential rate. You can see that it goes from 0.06 to 0.125 to 0.25. If you were to graph that it would be a exponential curve. You can see that it jumps alot.
0.0625 to 0.0625*2 to 0.0625*2*2 to 0.0625*2*2*2
a textbook store sold a combined total of 392 biology and psychology textbooks in a week. the number of psychology textbooks sold was 48 less than the number of biology textbooks sold. how many textbooks of each type sold?
Number of biology book sold are 223.
Number of psychology books sold are 183.
What is equation?In algebra, an equation is a declaration of equivalence that includes one or more variables or unknowable quantities.
Given Data
A textbook store sold a combined total of 392 biology and psychology textbooks in a week. the number of psychology textbooks sold was 48 less than the number of biology textbooks sold.
Let number of biology books sold be x
Let number of psychology books sold be (x- 48)
Total book sold = 392
392 = x + x - 48
392 + 48 = 2x
446 = 2x
x = 223
Number of biology book sold are 223.
Number of psychology books sold are 183.
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Riley and Paul go to the driving range. Together, they hit 75 balls. Riley hit 17 more than Paul. How many
balls did each of them hit?
Riley hit 46 balls and Paul hit 29 balls at the driving range.
According to the question, let
Number of balls hit by Riley be x
Number of balls hit by Paul be y
Together Riley and Paul hit 75 balls
∴x+y=75 (1)
Riley hit 17 more balls than Paul
∴x= y + 17 (2)
Now we have to solve these simultaneous linear equations (1) and (2)
Replacing the value of x from equation (2) into equation (1) we get,
y+17+y=75
⇒2y + 17 = 75
⇒2y = 75 - 17
⇒2y = 58
⇒y = 58/2 (dividing both sides by 2)
⇒y = 29
∴No. of balls hit by Riley = x = y +17 = 29 + 17 = 46 (from equation (2))
Therefore, Riley hit 46 balls and Paul hit 29 balls at the driving range.
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Convert to a percent: 0.341 A. 0.341% B. 341% C. 3,410% D. 34.1%
Answer:
34.1%, D
Step-by-step explanation:
To convert a number into a percent, you multiply it by 1, or more precisely, 100%. 100% can be thought of as 100 * 1%
0.341 * 100 * 1 % = 34.1%
Answer:
Step-by-step explanat
A spherical balloon is inflated so that its volume is increasing at the rate of 12 cubicfeet per minute. How fast is the radius of the balloon increasing when the radius is 6feet?
Given:
The rate of change in volume = 12 cubic feet per minute.
We need to find the rate of change of radius at radius = 6 feet.
Consider the formula to find the volume of the sphere.
[tex]V=\frac{4}{3}\pi r^3[/tex]Differentiate with respect to t.
[tex]\frac{dV}{dt}=\frac{4}{3}\pi\times3r^2\times\frac{dr}{dt}[/tex][tex]\text{ Substitute }\frac{dV}{dt}=12\text{ and r=6 in the formula.}[/tex][tex]12=\frac{4}{3}\pi\times3(6)^2\times\frac{dr}{dt}[/tex][tex]12=144\pi\times\frac{dr}{dt}[/tex]Dividing both sides by 144pi, we get
[tex]\frac{12}{144\pi}=\frac{dr}{dt}[/tex][tex]\frac{dr}{dt}=\frac{1}{12\pi}[/tex][tex]\frac{dr}{dt}=\frac{1}{37.68}=0.0265\text{ feet per minute}[/tex]Hence the radius of the balloon increases by 0.03 feet per minute.
HELP ASAP NEEDS TO BE TURNED IN TONIGHT
Answer:
y= 2x + 9
Step-by-step explanation:
The equation for lines can be written as y=–10x+5/4. Parallel to line's is line t, which passes through the point (1,3). What is the equation of line t?
Step-by-step explanation:
what I understood :
line s : y = -10x + 5/4
the slope is always the factor of x (here : -10).
a parallel lines must have the same slope.
line t : y = -10x + b
to get b we use the coordinates of the given point :
3 = -10×1 + b = -10 + b
13 = b
line t : y = -10x + 13
48,384 - 2,904 divided by 48,384 multiplied by 100
8+2x3²
= 8+6²
= 8+36
= 44
What are his mistakes?
Find the future value, using the future formula and a calculator. (Round your answer to the nearest cent.)$901 at 3.5% compounded semiannually for 6 years
To calculate the future value we need to use the compound formula:
[tex]A=P(1+\frac{r}{n})^{nt}[/tex]where P is the principal, r is the interest rate in decimal form, n is the number of times the interest is compound in any given time t.
In this case we have that P=901, r=0.035 and since the interest is compound semiannually this means that n=2. Finally t=6. Plugging this values into the equation above we have that:
[tex]\begin{gathered} A=901(1+\frac{0.035}{2})^{2\cdot6} \\ A=1109.53 \end{gathered}[/tex]Therefore the future value would be $1109.53
Kara currently makes $12 per hour. If she receives a
50% raise, what is her new rate?
What would a 75% raise be equal to????
K
TO
160
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please help ill give uu crown to the first person who is right
Answer:
No
Step-by-step explanation:
Using a graph typing in 9x and looking at the table, (2,1) is not on the table, so (2,1) is not a solution to 9x
Answer:
No
Step-by-step explanation:
to determine if (2, 1 ) is a solution, substitute the x- coordinate into the equation and if the result is equal to the y- coordinate then it is a solution.
y = 9x ( substitute x = 2 )
y = 9 × 2 = 18 ≠ 1
then (2, 1 ) is not a solution to the equation.
y + 8 < -9 solve for y please i need help im a smart student i just need a bit of help
Answer:
the answer is y<-17
Step-by-step explanation:
This is actually just like algebra.
y+8<-9
y<-9-8
y<-17
Elena drank 3 liters of water yesterday. Jada drank 3/4 times as much
water as Elena. Lin drank twice as much water as Jada.
1. How much water did Jada drink?
2. How much water did Lin drink?
liters
liters
slope -4; passes through (2, 3)
Answer: y = -4x + 11
Step-by-step explanation:
y = mx + b
3 = -4(2) + b
3 = -8 + b
11 = b
Rotate the shape as described.
The ordered pair for A' is
. The ordered pair for B' is
. The ordered pair for C' is
. The ordered paid for D' is
By applying a rotation of 90° clockwise to square ABCD, we have the following:
The ordered pair for A' is (5, -3).The ordered pair for B' is (-2, 7).The ordered pair for C' is (8, 8).The ordered pair for D' is (10, 4).What is a rotation?A rotation is a type of transformation which moves every point of the object through a number of degrees around a given point, which can either be clockwise or counterclockwise direction.
In Mathematics, rotating a point 90° about the origin in a clockwise or counterclockwise direction would produce a point that has the coordinates (y, -x).
By applying a rotation of 90° clockwise to square ABCD, the coordinate of the image of square A'B'C'D' is given by:
(x, y) → (y, -x)
Points at A = (-3, 5) → Points at A' = (5, -(3)) = (5, -3)
Points at B = (-7, -2) → Points at B' = ((-2), -(-7)) = (-2, 7).
Points at C = (-8, 8) → Points at C' = (8, -(-8)) = (8, 8).
Points at D = (-4, 10) → Points at D' = (10, -(-4)) = (10, 4).
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What’s the answer plss
The length of the opposite side XY = 15.2cm
How to calculate the opposite side XY?
From the right- triangle XYZ,
[tex]sin \theta =\frac{opposite}{hypotenuse}\\\\sin 61 ^\circ=\frac{XY}{XZ} \\\\XY = sin 61 ^\circ *XZ\\\\XY = 0.875* 17.4 \\\\XY = 15.2cm[/tex]
The length of the opposite side XY = 15.2cm
What is opposite side of a right-triangle?
From a particular angle, the opposite side is across. The legs of a right triangle are its adjacent and opposite sides, together, they make up the triangle. The opposing (shorter) side is the side that is shorter and perpendicular to the angle from which you are observing it.The angle from which we are looking does not include this side.An opposite side in a right triangle is the one that is across from a given angle, while an adjacent side is the one that is next to a given angle and the hypotenuse is the longest side in a right triangle.To learn more about opposite side, refer:
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f(x)= 3x; translation up 5 units
After applying the given translation we get the function as 3x + 5
Graph translation is the process of converting an equation or existing graph into a new graph.
One common type of algebraic issue is changing algebraic equations.
A parent function's graph is altered by a translation. The three different types of translation are dilations, reflections, and translations.
A function can have its y-values modified vertically or its x-values changed horizontally (affects the x-values).
We are aware that the x- and y-coordinates must be modified to reflect the translation by the specified amount.
f( x ) = 3x is translated 5 units upwards.
Therefore the required graph is f ( x ) = 3x + 5 .
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Which number is most likely an irrational number?
OA. -33.948826765...
B. 10.600000000...
O C. -6.099999999...
OD. 0.874874874...
The answer is A because it's a non-recurring decimal.
In ΔTUV, UV = 14, VT = 19, and TU = 9. Which statement about the angles of ΔTUV must be true?
In ΔTUV, UV = 14, VT = 19, and TU = 9, The statement about the angles of ΔTUV that must be true is [tex]m \angle U > m \angle T > \angle V[/tex] Option 5
This is further explained below.
What are angles?Generally, A triangle's angle is a measurement of the length of the side that is perpendicular to it.
This indicates that if one of the sides is longer in length, then the measure of the angle opposite to it will also be longer.
The angles in the triangle TUV are denoted by the symbols T, U, and V.
The side that is UV, TV, and T U correspondingly is the side that is opposite to these angles.
The length of the opposing sides will immediately determine the measure of the angles, which will be directly proportionate to those angles.
since V T>U V>T U, the arrangement of angles will correspond to this as follows: [tex]m \angle U > m \angle T > \angle V[/tex] Option 5
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CQ
In $\triangle T U V$, UV $=14, V T=19$, and $T U=9$. Which statement about the angles of $\triangle T U V$ must be true?
$\mathrm{m} \angle V>\mathrm{m} \angle T>\mathrm{m} \angle U$
$\mathrm{m} \angle T>\mathrm{m} \angle U>\mathrm{m} \angle V$
$\mathrm{m} \angle U>\mathrm{m} \angle V>\mathrm{m} \angle T$
$m \angle V>m \angle U>m \angle T$
$m \angle U>m \angle T>m \angle V$
$\mathrm{m} \angle T>\mathrm{m} \angle V>\mathrm{m} \angle U$
The amounts of e-waste generated in a region during two years were 14,200,000 tons and 10,700,000 tons. What was the total e-waste generated over these two years in the region, expressed in scientific notation? (5 points)
Group of answer choices
2.49 ⋅ 1014 tons
2.49 ⋅ 107 tons
24.9 ⋅ 1014 tons
24.9 ⋅ 107 tons
The total e-waste generated over these two years in the region, expressed in scientific notation, is B. 2.49 x 10^7 tons.
What is a scientific notation?Scientific notation is a standard form of expressing a short or large number in a decimal form.
Scientific notation involves writing a number that is greater than 1 but less than 10 with the power of 10.
Correct scientific notations express numbers as products of a number between 1 and 10 multiplied by an appropriate power of 10 based on its place value in the given decimal.
Thus, the total e-waste generated cannot be expressed in scientific notation as Options A, C, or D because these do not comply with the rules of scientific notations, unlike Option B.
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(2x - y)² =
(3x-1)(3x+5)=
Please help simplify both problems !
Answer: 4x^2 - 4xy + y^2 and the second one 9x^2 + 12x - 5
I hope this helps
The steps at the right show cam's works in solving an equation. Circle the line where he makes a mistake. Then, find the correct solution to the equation.
The correct solution to the equation is -13.
-12x + 12 = -3(5x + 8)
Split the right-hand side,
-12x + 12 = -15x + 24 (This line have error, instead of + there will be - )
Shifted the values of x to the left-hand side and the constant values to the right-hand side,
3x + 12 = 24
3x = 12
x= 4, which is the incorrect value of x.
The correct solution to the equation,
-12x + 12 = -3(5x + 8)
Split the right-hand side,
-12x + 12 = -15x - 24
Shift the values of x to the left-hand side and the constant values to the right-hand side,
3x = -36
The final value of x,
x = -13
Therefore, the value of x is -13.
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PLEASE HELP DUE IN 4 MINUTES, THANK YOU!!
Answer:
A 100% increase in a total means the final amount is 200% of the initial amount.
A 100% decrease in a total means the final amount is 0% of the initial amount.
Error means that you were a way off from the real value
Step-by-step explanation:
Need help solving these questions!! thank you :)
Answer:
1. 25+5c
2. -8y-16
3. (m+1)^9
4. -6a-15
5. 4y+12z
6. (2a+3b)^4
7. 23c
8. 8y+7x
9. 14a+16
10. 16m+16n
A study on students drinking habits wants to determine the true average number of alcoholic drinks all uf greek students have in a one week period. We know from preliminary studies that the standard deviation is around 6. 3. How many students should be sampled to be within 0. 5 drink of population mean with 95% probability?.
Number of students need to be sampled = 610
A study to determine the true average number of alcoholic drinks consumed by Greek students is conducted.
Standard Deviation, σ = 6.3
Margin Error of population mean, E = 0.5
Probability = 95% = 0.95
The p-value corresponding to 0.95 probability = (1+0.95)/2 = 0.975
The z-score corresponding to this p-value = 1.96 [from the z-tables]
Now, The margin error, E = zσ/√n, where n is the sample size
⇒ n = (zσ/E)²
⇒ n = (1.96 x 6.3/0.5)²
⇒ n ≈ 610
Hence 610 students need to be sampled.
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Darlene has 6 3/4 gallons of gasoline. Every time she mows her lawn, she uses 3/8 gallon. How many times can she mow her lawn before she needs more gas?w
The number of times Darlene mow her lawn before she needs more gasoline is equal to 18times.
As given in the question,
Total gasoline with Darlene is equal to 6 3/4 gallons
Convert mixed fraction into proper fraction:
6 3/4 = 27/4 gallons
Every time amount of gasoline used to mow her lawn = 3/ 8gallon
Number of times Darlene mow her lawn before she needs more gasoline
= (27 / 4) ÷ (3 /8)
= (27 /4) × (8/3)
= 18 times
Therefore, the number of times Darlene mow her lawn before she needs more gasoline is equal to 18times.
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Evaluate : (12.5)³
find the answer
Answer:
1953.125
Step-by-step explanation:
(12.5)³
= 12.5 × 12.5 × 12.5
= 1953.125
Answer: 1953.125
(12.5)³
so 12.5 multiplied to itself thrice
12.5x12.5x12.5
which is 1953.125
how long does it take ella to run 7.5 kilometers
May someone please help me! I have to submit this tonight and do not know how to do it or the answer may you please help me thank you!