Given the normal distribution, the following can be illustrated:
1. The number of people who have an IQ between 70 and 130 is 1024.
2. The number of people who have an IQ between 85 and 115 is 1024.
The number of people who have an IQ over 145 is 3.
How to compute the value?1. The The number of people who have an IQ between 70 and 130 will be:
z(115) = (130-100)/15 = 2
z(85) = (70-100)/15 = -2
P(-2< z < 2) = 0.6827
The number of 1500 that have IQ between 70 and 130 will be:
= 0.6827 × 1500
= 1024
2. The number of people who have an IQ between 85 and 115 will be:
z(115) = (115-100)/15 = 1
z(85) = (85-100)/15 = -1
We need to consult Z-table to find P value with this Z value
P(85< x < 115) = P(-1< z < 1) = 0.6827
Number of people of 1500 that have IQ between 85 and 115:
= 0.6827 × 1500
= 1024
3. The number of people who have IQ over 145?
Z(>145)
=( 145-100)/15
=3
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4 = 4(k − 15) hhhhhhhhhhhhhhhhhhhhhhhhhhhhhhhhhhhhh
Answer:
distribute the 4 to the k and -15 so you get 4=4k-60 then add the 60 to the other 4 so its 64=4k then divide 4 to 64 and your answer is 16
Step-by-step explanation:
[tex]4=4k-60\\4k-60=4\\4k=4+60\\4k=64\\\frac{4k}{4} =\frac{64}{4} \\k=16[/tex]
As solved above k=16
3. Write each of the following numerals in base 10. For base twelve, T and E represent the face values ten and eleven,
respectively.
A numeral exists a sign, combination of symbols, or figure that represents a number.
142 in base 5 means [tex]$1\left(5^2\right)+4\left(5^1\right)+2\left(5^0\right)[/tex] = 25 + 20 + 2 = 47
11011 in base 2 means [tex]$1\left(2^4\right)+1\left(2^3\right)+0\left(2^2\right)+1\left(2^1\right)+1\left(2^0\right)[/tex]= 27π
39 T in base 12 means [tex]$3\left(12^2\right)+9\left(12^1\right)+10\left(12^0\right)[/tex] = 550
What is meant by numeral?A numeral is a sign, combination of symbols, or figure that represents a number. It can be a mathematical numbering system.
A numeral's value is determined by the number it represents. All modern numbers cannot be represented by all number systems; Roman numerals, for instance, do not have a zero. A numeral system should, in theory, be able to: Represent a useful set of numbers (e.g. all integers, or rational numbers).
The correct answer is as follows:
142 in base 5 means [tex]$1\left(5^2\right)+4\left(5^1\right)+2\left(5^0\right)[/tex] = 25 + 20 + 2 = 47
11011 in base 2 means [tex]$1\left(2^4\right)+1\left(2^3\right)+0\left(2^2\right)+1\left(2^1\right)+1\left(2^0\right)[/tex]= 27π
39 T in base 12 means [tex]$3\left(12^2\right)+9\left(12^1\right)+10\left(12^0\right)[/tex] = 550
The complete question is:
Write each of the following numerals in base 10. For base twelve, T and E represent the face values ten and eleven, respectively.
Write each of the following numerals in base 10. For base twelve, T and E represent the face values ten andeleven, respectively.
a. 142five
b. 11011two
c. 39Ttwelth
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The functions f and g are defined as follows.
f (x) = 4x - 3 g (x) = -3x^2 - 2
Find f (-4) and g (3)/
Simplify your answers as much as possible.
Answer: [tex]f(-4)=-19, g(3)=-29[/tex]
Step-by-step explanation:
[tex]f(-4)=4(-4)-3=-19\\\\g(3)=-3(3)^2 -2=-29[/tex]
A committee has fourteen members. There are two members that currently serve as the board's chairman
and ranking member. Each member is equally likely to serve in any of the positions. Two members are
randomly selected and assigned to be the new chairman and ranking member. What is the probability of
randomly selecting the two members who currently hold the positions of chairman and ranking member and
reassigning them to their current positions?
...
Probability of randomly selecting two members who currently hold positions of chairman and ranking member and reassigning them to their current positions from a committee of 14 members is (1 /182).
As given,
Total members in the committee=14
Number of members serve as chairman and ranking member=2
Total number of ways to assigned new position
=¹⁴P₂
=(14!) / (14-2)!
=(14 × 13 × 12!) / 12!
=14 ×13
=182
Each member is equally likely to serve in any of positions.
Each position there is only one way to reassign position.
Probability of randomly selecting two members = 1 /182
Therefore, probability of randomly selecting two members who currently hold positions of chairman and ranking member and reassigning them to their current positions from a committee of 14 members is (1 /182).
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5. Solve: x² – 3x – 18 = 0a. x= -6, x= 3b. X = 6, X = -3c. X = -9, x = 2d. x = 9, X = -2
Write out the equation
[tex]undefined[/tex]Given m/8= 86° and m/4= (4x + 2)°, what is the value of x ?
X =
Bring the variable to the left and the remaining values to the right to define the value of x. If m/8 = 86° and m/4 = (4x + 2)° then value of x = 21.
How to find the value of x?Any of the algebraic expressions, including addition, subtraction, multiplication, and division, should be used. Bring the variable to the left and the remaining values to the right to determine the value of x. To determine the outcome, simplify the values.
Let the m/8 = 86° and m/4 = (4x + 2)°
m ∠4 = m ∠8 (Corresponding angles are equal)
To estimate the value of x
4x + 2 = 86
Substracting both sides of the equation by 2, we get
4x + 2 - 2 = 86 - 2
simplifying the above equation,
4x = 86 - 2
4x = 84
Dividing both sides of the equation by 4, we get
4x / 4 = 84 / 4
x = 21
Therefore, the value of x = 21.
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The Pythagorean Identity is sin^2x+cos^2x=1. Write this equation two other ways.
[tex]\sin^2 x=1-\cos^2 x \\ \\ \cos^2 x=1-\sin^2 x[/tex]
equation of the line that passes through the point (1, -1) & is parallel to the graph of y = 3/5x + 2?
Equation is 5y = 3x + 8.
What is slope?Slope is the inclination of a line with respect to the horizontal is measured numerically. The slope of any line, ray, or line segment in analytical geometry is defined as the ratio of the vertical to the horizontal distance between any two points on the line, ray, or segment. The ratio of the increase in elevation between two points to the run in elevation between those same two points is referred to as the slope.
Given Data
line that passes through the point (1, -1) &
is parallel to the graph of y = 3/5x + 2
y = mx + c
y = [tex]\frac{3}{5}[/tex]x + 2
m = [tex]\frac{3}{5}[/tex]
Equating points,
-1 = [tex]\frac{3}{5}[/tex](1) + c
-1 = [tex]\frac{3}{5}[/tex] + c
-1 - [tex]\frac{3}{5}[/tex] = c
[tex]\frac{-5-3}{5}[/tex] = c
[tex]\frac{-8}{5}[/tex]
Equation-
y = [tex]\frac{3}{5}[/tex]x + [tex]\frac{8}{5}[/tex]
5y = 3x + 8
Equation is 5y = 3x + 8.
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4.
908 ÷ 10 Power of 5
0.908
90.800,000
9.08
0.00908
Answer:
0.00908 is the answer...
The house that David bills for his cat cat is a cube with an edge length of 4 ft to how to use the volume formula V equals x exponent 3 find the volume of the house
The volume of house built by David for cat is 64 ft³.
Firstly representing the mentioned statement about volume as mathematical expression. Exponent is the power of variable or constant. So, volume = x³, where x is the edge length.
As the edge length of house of car is given, we will keep the value in formula to find the volume of house.
V = 4³
Taking cube of the value on Right Hand Side of the equation
V = 4×4×4
Performing multiplication on Right Hand Side of the equation
V = 64 ft³
Thus, the volume of the house of cat is 64 ft³.
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If 1 x 10^a + 2 x 10^b + 3 x 10^c + 4 x 10^d = 24130 and a≠b≠c≠d, then what does a/2 + b/4 + c/8 + d/16 equal?
Question 1
Using scientific notation, we know a=2, b=4, c=1, and d=3. So,
[tex]\frac{a}{2}+\frac{b}{4}+\frac{c}{8}+\frac{d}{16}=1+1+\frac{1}{8}+\frac{3}{16}=37/16[/tex]
Question 2
[tex]a+13b=3(3a-b)\\\\a+13b=9a-3b\\\\16b=8a\\\\a=2b\\\\\therefore \frac{a^3}{b^3}=\frac{(2b)^3}{b^3}=\frac{8b^3}{b^3}=8[/tex]
Simplify the following expressions (10)
The given expression is,
[tex](3y^2-1)(2y^2-5y+8)[/tex]Using distributive property( A (B+C)=AB+BC),
[tex](3y^2-1)(2y^2-5y+8)=3y^2(2y^2-5y+8)-1(2y^2-5y+8)[/tex]Again using distributive property in RHS of above equation,
[tex]\begin{gathered} (3y^2-1)(2y^2-5y+8)=3y^2\times2y^2+3y^2\times(-5y)+3y^2\times8)-2y^2+5y-8 \\ (As\text{ }x^ax^b=x^{a+b}) \\ =6y^4-15y^3+24y^2-2y^2+5y-8 \\ =6y^4-15y^3+22y^2+5y-8 \end{gathered}[/tex]Therefore, the simplified expression is,
[tex]6y^4-15y^3+22y^2+5y-8[/tex]Identify the number as real, complex, pure imaginary, or nonreal complex. (More than one of these descriptions may
apply.)
square root of -9
Select all descriptions that may apply.
A. Nonreal complex
B. Real
C. Pure imaginary
D. Complex
Answer:
acxdddhdhxhhh sax skskskkkkkddffffffrrkel sssddjeeeeerrjrrjtjjj
Let u = (1, −1, 3, 5) and v = (2, 1, 0, −3). Find scalars a and
b so that au + bv = (1, −4, 9, 18).
The value of the scalars a = 3 , and b = -1 .
In the question ,
it is given that
u = (1, −1, 3, 5) and v = (2, 1, 0, −3)
and the equation au + bv = (1, −4, 9, 18)
Substituting the first value of u that is u=1 and substituting the first value of v that is v=2 ,
we get a+2b=1 ....(i)
Now , Substituting the second value of u that is u= -1 and substituting the second value of v that is v=1 ,
we get -a+b= -4 ...(ii)
Solving the equations (i) and (ii)
Adding both the equations we get
a-a+2b+b=1-4
3b= -3
b= -1
a+2b=1
put b= -1
a+2(-1)=1
a-2=1
a=3.
Therefore , the value of the scalars a = 3 , and b = -1 .
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How is climate change altering the approach to sustainability and sustainable development?
Climate change is altering the approach to sustainability and sustainable development as a result in the disruption of the economy of the countries which are affected.
What is Climate change?This is referred to as the long-term shifts in temperatures and weather patterns and are influenced by factors such as greenhouse gas emissions, solar cycle etc which affects the different factors.
Climate change will make people become poor due to the unfavorable working environment being it causes and therefore brings about a disruption in the economy as there will be a shift in focus which makes it the correct choice.
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If y = 2cos(lnx). + 3sin(Inx) then Select one: 0 dy a 22 dy +r +y = 0 dx dx2 d'y x2 dy +2 dr2 dr y=0 o x2d²y dy dx + y To dx2 day 22 dy dr -y=0 dr2
Solution
Given
[tex]y=2\cos(\ln x)+3\sin(\ln x)[/tex][tex]\begin{gathered} \frac{dy}{dx}=\frac{-2}{x}\sin(\ln x)+\frac{3}{x}\cos(\ln x) \\ \\ \end{gathered}[/tex]Graph the polynomial function. Note x- and y-intercepts, multiplicity, and end behavior.h(x) = (x − 1)3(x + 2)2
Given:
[tex]h\left(x\right)=\left(x-1\right)^3\left(x+2\right)^2[/tex]To graph the given polynomial function, we can plug in any values of x to find values of h(x). The graph is shown below:
We also note that the x-intercept is the point on the x-axis, while the y-intercept is the point on the y-axis. Hence,
x-intercepts: (1,0), (-2,0)
y-intercept: (0,-4)
Tt can also be noted that (x − 1) occurs 3 times while (x+2) occurs 2 times. Hence, x=1 has a multiplicity 3, while x=-2 has a multiplicity 2.
aased on the graph, the end behavior would be:
[tex]as\text{ x}\rightarrow+\infty,h(x)\rightarrow+\infty,\text{ and as x}\rightarrow-\infty,h(x)\rightarrow-\infty[/tex]If the inequality y < 3x – 4 is graphed in the xy - plane above, which quadrant contains no solutions to the inequality? (A) Quadrant I (B) Quadrant II (C) Quadrant III (D) Q8uadrant IV
Answer:
T
(B) Quadrant II
xplanation:
Firstly, let us plot the graph of the inequality;
[tex]y<3x-4[/tex]We can plot the graph as:
From the graph of the inequality, we can see that the solution to the inequality are only contained in the Quadrant I, Quadrant III and Quadrant IV. So, And the is no solution in the Quadrant II.
Therefore, the Quadrant that contains no solutions to the inequality is Quadrant II
help meeeeeeeeeeeeeeeeeeeeeeeeeeeeeeeeeee
Answer:
74.52
Step-by-step explanation:
[tex]P(10)=0.018(10)^3-0.294(10)^2+3.074(10)+55.180 \\ \\ =74.52[/tex]
59 + 43.6 estimate the sum or difference
Answer:
Step-by-step explanation:
59+ 43.6
43.6=44.0
59+44
59+43.6
=103.0
In a lottery game, a player picks six numbers from 1 to 21. if the player matches all six numbers they win 50,000 dollars otherwise they lose $1
Your best option is to simply choose six distinct numbers, in any sequence. You would win if those six numbers matched the six that the lottery officials chose (again, in any sequence).
The likelihood of selecting the correct six numbers is one in
[tex]\frac{23}{6}[/tex] = [tex]\frac{23}{6(23-6)}[/tex] = [tex]\frac{23.22.21.20.19.18}{1.2.3.4.5.6}[/tex] = 100974
Therefore, 100946/100947, or a probability of losing, is very near to 1.
The total of your payouts multiplied by the probability that each scenario will occur is the anticipated value of the game. which is
(50,000) [tex]\frac{1}{100947}[/tex] + (-1) [tex]\frac{100946}{100947}[/tex] = [tex]\frac{50000-100946}{100947}[/tex] = -0.5046
You will typically break even if its value is 0. You should play the game if it is more than zero because you will typically win, and you shouldn't play it if it is less than zero because you will typically lose. The payoff is decently substantial for this, however the typical player loses just over 70 cents per round. Almost every player loses a complete dollar.
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Translate this sentence into an equation.
Carlos's height decreased by 7 is 62
Use the variable c to represent Carlos's height
What is the solution of 2 + 2 =
Which function, g or h, is the inverse function for function f? CHECK PHOTO
Answer: The function g because the graphs of f and g are symmetrical about the line y=x.
Answer:
A. The function g because the graphs of f and g are symmetrical about the line y=x.
Step-by-step explanation:
A passbook savings account has a rate of 10% Find the effective annual yield if the interest is compounded daily.
The effective annual yield if the interest is compounded daily is 10.5155 %.
The annual interest rate or rate of return that an investor is entitled to over a particular time period is known as effective annual yield.
In the case of daily, there are 360 days in a year.
Therefore, making n = 360.
Therefore, the effective annual yield if the interest of 10% is compounded daily when r = 10 % and n = 360 will be:
Y = ( 1 + r/n )ⁿ - 1
Y = ( 1 + 0.1 / 360 )³⁶⁰ - 1
Y = ( 1 + 0.000277 )³⁶⁰ - 1
y = 1.105155 - 1
Y = 0.105155
However, since it is in decimal form, we must first multiply it by 100 before adding the symbol "%" after the last digit of the value.
Therefore,
Y = 0.105155 × 100%
Y = 10.5155 %
Therefore, the effective Annual Yield is 10.5155 %
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What is (-5,2); m=2/5 in standard form?
The standard form of the straight line is given by 5y - 2x = 20 .
Ax + By = C is the standard form for two-variable linear equations.
Standard form is used, for instance, in the linear equation 6x+5y=11. This method makes finding an equation's two intercepts very simple (x and y) .Y = mx + c is the cartesian equation for a straight line, where m denotes the gradient of the line and c denotes the location of its y-axis intersection.An infinitely long object without any width, depth, or curvature is a line. Since they can exist in two, three, or higher dimensions, lines are one-dimensional objects.We know that when a straight line passes through (a,b) with slope m then the equation of the line is given by:
y - b = m ( x - a )
putting the values in the respective places we get:
y - 2 = 2/5 × ( x + 5 )
or, 5y - 10 = 2x + 10
or , 5y - 2x = 20
Hence the standard form of the straight line is given by
5y - 2x = 20 .
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You have a combination lock
with 3 secret digits. Find the 3
correct digits using the
following clues and enter your
answer below.
127 One digit is right and in its place
138 One digit is right, but in the wrong place
791
Two digits are right but both are in the
wrong place
452 All digits are wrong
8
529 One digit is right, but in the wrong place
Answer:
987
Step-by-step explanation:
You want to determine a three-digit combination based on clues about which digits are right and/or correctly placed.
Clue 1This tells you one of digits 1, 2, or 7 is correct and correctly placed.
Clue 2 tells you that digit is not 1. Clue 4 tells you that digit is not 2.
7 is correctly placed as the 3rd digit
Clue 2We already know that 1 is not the correct digit. This means 3 must be the first digit, or 8 must be the first or second digit.
Clue 3We already know that 7 is a correct digit, properly placed as the 3rd digit. Since 1 is not a correct digit, 9 must be a correct digit, properly placed as the 1st digit.
9 is correctly placed as the 1st digit
Combining this fact with Clue 2 means ...
8 is correctly placed as the 2nd digit
The combination is 987.
__
Check
Clues 4 and 5 are consistent with this combination.
1&4/5 on a number line
Need help answering this
Let's multiply the following polynomial:
[tex]\text{ \lparen5x}^2\text{ + y\rparen\lparen x}^2\text{ -2y\rparen}[/tex]We get,
[tex]\text{ \lparen5x}^2\text{ + y\rparen\lparen x}^2\text{ - 2y\rparen= \lparen5x}^2)(\text{x}^2)\text{ + \lparen5x}^2)(-\text{2y\rparen+ \lparen y\rparen\lparen x}^2)\text{ + \lparen y\rparen\lparen-2y\rparen}[/tex][tex]\text{ = 5x}^4\text{ - 10x}^2y\text{ + x}^2y\text{ - 2y}^2[/tex][tex]\text{ = 5x}^4\text{ - 9x}^2y\text{ - 2y}^2[/tex]after school, a group of students decides to have a snowball fight. with 2 students on a team, they can make 6 snowballs per minute. with 10 students on a team, they can make 30 snowballs per minute. what is the slope in this situation?
Based on the calculations using the given points, the slope in this situation is equal to 5.
What is a slope?A slope is also referred to as gradient and it's typically used to describe both the ratio, direction and steepness of the function of a straight line.
How to calculate the slope of a line?Mathematically, the slope of any straight line can be calculated by using this formula;
[tex]Slope = \frac{Change\;in\;y\;axis}{Change\;in\;x\;axis}\\\\Slope = \frac{y_2\;-\;y_1}{x_2\;-\;x_1}[/tex]
Substituting the given points into the formula, we have;
Slope = (30 - 10)/6 - 2)
Slope = 20/4
Slope = 5.
In conclusion, the slope of the line that passes through the given points is equal to 5.
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