Answer:
272 is the test score for Brandi.
Step-by-step explanation:
Normal Probability Distribution:
Problems of normal distributions can be solved using the z-score formula.
In a set with mean [tex]\mu[/tex] and standard deviation [tex]\sigma[/tex], the z-score of a measure X is given by:
[tex]Z = \frac{X - \mu}{\sigma}[/tex]
The Z-score measures how many standard deviations the measure is from the mean. After finding the Z-score, we look at the z-score table and find the p-value associated with this z-score. This p-value is the probability that the value of the measure is smaller than X, that is, the percentile of X. Subtracting 1 by the p-value, we get the probability that the value of the measure is greater than X.
Mean of 250 and standard deviation of 25:
This means that [tex]\mu = 250, \sigma = 25[/tex]
Brandi scored at the 81st percentile on this test. What was her test score?
The z-score of her score of X has a p-value of 0.81. This means that her score is given by X when Z = 0.88.
[tex]Z = \frac{X - \mu}{\sigma}[/tex]
[tex]0.88 = \frac{X - 250}{25}[/tex]
[tex]X - 250 = 0.88*25[/tex]
[tex]X = 272[/tex]
272 is the test score for Brandi.
Write the coordinates of the vertices after a translation 9 units left and 5 units down.
10
The length of a rectangle is 3 inches longer than it is wide. If the area is 180 square inches, what are the
dimensions of the rectangle?
Answer:
Width=12 inches
Length=15 inches
Step-by-step explanation:
Let's say the width is x.
Then, the length is x+3.
The area of a rectangle is the length times width, so
x(x+3)=180
x^2+3x=180
x^2+3x-180=0
After using the quadratic formula, x comes out to be 12 or -15.
x cannot be -15 because you can't have negative distance, so we are left with x=12.
The width is 12 inches and the length is 12+3=15 inches.
Check: 12*15=180
Answer:
The width is 12 and the length is 15.
Step-by-step explanation:
You set the equation as x is equal to the width and since the lenght is 3 units longer than the width, it can be seen as "x + 3"
[tex]Area=(Length)(Width)[/tex]
180= x × (x + 3)
Then from there you just solve for x.
find the volume of the cone. Round you’re answer to the nearest truth if necessary. Use 3.14
Answer:
1,961.6
Step-by-step explanation:
A bag contains the letters of the alphabet. What is the probability of choosing a vowel from the bag? (a, e, i, o and u )
13/26
1/26
19/26
5/26
Answer:
13/26
Step-by-step explanation:
Trust me babes
PLEASE HELP MATH QUESTION 99 POINTS ASAP
Function A and Function B are linear functions. Compare the two functions and choose all that are correct.
Answer:
2 .The slope of Function A is less than the slope of Function B
A graph of Function A shows it has a y-intercept of 4, the same as that of Function B. (Statements 3 and 4 are not correct.)
The slope of Function A is 2, which is less than the slope of 3 that Function B has. (Statement 2 is correct; statement 1 is not.)
_____
More detailed working
The slope of Function A can be figured easily between the points with x-values that differ by 1:
m = (y3 -y2)/(x3 -x2) = (24-22)/(10-9) = 2/1 = 2 . . . . . Fun A has slope of 2.
The slope of Function B is the coefficient of x in the equation: 3.
__
The y-intercept of Function A can be found starting with point-slope form:
y -22 = 2(x -9)
y = 2x -18 +22
y = 2x +4 . . . . . . . slope-intercept form
The intercept of +4 is the same as that of Function B.
Step-by-step explanation:
mrk me brainliest plz
Answer:
2 .The slope of Function A is less than the slope of Function B
A graph of Function A shows it has a y-intercept of 4, the same as that of Function B. (Statements 3 and 4 are not correct.)
The slope of Function A is 2, which is less than the slope of 3 that Function B has. (Statement 2 is correct; statement 1 is not.)
_____
More detailed working
The slope of Function A can be figured easily between the points with x-values that differ by 1:
m = (y3 -y2)/(x3 -x2) = (24-22)/(10-9) = 2/1 = 2 . . . . . Fun A has slope of 2.
The slope of Function B is the coefficient of x in the equation: 3.
__
The y-intercept of Function A can be found starting with point-slope form:
y -22 = 2(x -9)
y = 2x -18 +22
y = 2x +4 . . . . . . . slope-intercept form
The intercept of +4 is the same as that of Function B.
Step-by-step explanation:
MARK ME BRAINLEIST PLZ PLZ PLZ
If mikes salary is $62,500 this year and next year he will get 5.5% increase in salary. How much is his new salary.
Plssss answer
Answer:
65,937.5
Step-by-step explanation:
Answer:
$65,937.5
Step-by-step explanation:
5.5%× 62500= $3,437.5
$62,500+ $3,437.5= $65,937.5
a loaf of bread has 12 slice. micky ate 1/4 of the loaf. write the fraction of the loaf micky ate in twelfths
Answer:
3/12
Step-by-step explanation:
1/4*3/3=3/12
pls I need the answer and explanasion
Answer:
=no of children who like oatmeal/toatal population*100%
=15/50*100%
=(1500/50)%
=30%
Step-by-step explanation:
What is the scale factor
Please help me
A scale drawing of a park can be seen below. If 1 inch is equal to 15 feet. What is the actual area of the park
Answer:
Where's the drawing? Can you include it?
Step-by-step explanation:
What is the length of the third side?
Answer:
√115
Step-by-step explanation:
14²= 9² + x²
x= √14²-9² = √115
Step-by-step explanation:
using Pythagores theorem
h²=p²+b²
14²=p²+9²
p²=196-81
p=√115
p=10.72
stay safe healthy and happy...PLEASE HELP MATH QUESTION 99 POINTS HELP ASAP PLEASE
LOOK AT LINKED IMAGE FOR QUESTION.
Answer:
Graph A. not a function
Graph B. is a function
Mapping A. is a function
Mapping B. not a function
Table A. not a function
Table B. is a function
Answer:
a graph. not a function
b graph.function
a table. not a function
b table. function
maaping a. function
mapping b. not a function
Step-by-step explanatio n:
mark me brainelst plz
Given a feedlot of about 2500 cows, if an individual cow produces about 40 liters of manure per day, how many kiloliters of manure would be produced in one month?
9514 1404 393
Answer:
3000 kL
Step-by-step explanation:
(2500 cows)(40 L/day/cow)(30 day/mo)(1 kL/(1000 L)) = 2.5×40×30 kL/mo
= 3000 kL/mo
About 3000 kL of manure would be produced in one month.
___
That's about 3 cubic meters.
18 m 13m 13 m find the surface area
Answer:
3510 m² I guess..........
What do you think the answer is
Find the missing length.
c=[?]
6
C
9
Pythagorean Theorem: a2 + b2 = c2
Enter
Answer:
yep
Step-by-step explanation:
mhm
Answer:
c = 10.81
Step-by-step explanation:
if it's a² + b² = c²
6² + 9² = c²
36 + 81 = c²
117 = c²
(square root both)
10.81 = c
(I think this is right)
Find the missing side. Round to the nearest tenth
Answer:
We know Cot51 = x/17
=> 0.809784 × 17 = x
=> 13.753 = ×
.°. The value of x = 13.753 ~~ 14.000 (Ans)
After a hailstorm, a large car dealership wants to determine the proportion of cars that have damage. The service
department randomly selects 50 cars on the dealership lot, examines them, and finds that 11 cars have damage.
They want to construct a 99% confidence interval for the true proportion of cars with damage from the storm. Are
the conditions for inference met?
O Yes, the conditions for inference are met.
O No, the 10% condition is not met.
No, the randomness condition is not met.
No, the Large Counts Condition is not met.
Answer:
A, yes the conditions for inference are met
Step-by-step explanation:
I got the question right so it's right
Plz help me well mark brainliest if correct..????
Answer:
B.option is the correct answer right no
Answer:
300 miles
Step-by-step explanation:
I couldn't see the top bit by friday because it was outside of the photo, but if my estimations are correct, it should reasonably be 300 miles
Norman purchases five pounds of apples for $10. What is the price per pound?
Answer:
2 dollars per pound
Step-by-step explanation:
10/5=2
Answer:
2 Dollars per pound
Step-by-step explanation:
you can divide $10 by how many bags of apples you bought to get 2 dollars per pound
This figure consists of a rectangle and semicircle.
What is the perimeter of this figure?
Use 3.14 for pi.
60.84 m
72.84 m
79.68 m
98.52 m
Answer:
hope it helps!
Step-by-step explanation:
Perimeter includes three sides of rectangle:
15m + 12m + 15m
Plus half of circle with diameter 12m
Circumference = diameter * PI
Circumference = 37.68m.
1/2 circumference = 18.84m
Total perimeter is 15m+12m+15m+18.84m
60.84m
Answer:
The answer is 60.84.
Step-by-step explanation:
plzzzzzzzz help for a brainly
Answer:
246
Step-by-step explanation:
Sequences:
Determine the first five terms of the following sequences:
A. [tex]a_{n} = \frac{2n+3}{4}[/tex]
B. [tex]a_{n} = \frac{n-3}{n-2}[/tex]
Answer:
A.
aₙ = (2n + 3)/4The first 5 terms:
a₁ = (2*1 + 3) / 4 = 5/4a₂ = (2*2 + 3) / 4 = 7/4a₃ = (2*3 + 3)/ 4 = 9/4a₄ = (2*4 + 3) / 4 = 11/4a₅ = (2*5 + 3) / 4 = 13/4B.
aₙ = (n - 3)/(n - 2)The first 5 terms:
a₁ = (1 - 3) / (1 - 2) = 2a₂ = (2 - 3) / (2 - 2) = undefineda₃ = (3 - 3)/ (3 - 2) = 0a₄ = (4 - 3) / (4 - 2) = 1 / 2a₅ = (5 - 3) / (5 - 2) = 2 / 3what's the slope for coordinates (-3,2) (3,-3)
Answer:
-5/6
Step-by-step explanation:
slope = (difference in y)/(difference in x)
slope = (-3 - 2)/[3 - (-3)] = -5/6
Answer:
-5/6
Step-by-step explanation:
Find the number of faces, edges, and vertices of the solid.
Answer:
Faces ~ 6
Edges ~ 12
Vertices ~ 8
If this helped, please mark me brainliest (๑・ω-)～♥”
30) 30) At a liberal arts college, students are classified as humanities or science majors. There is a probability of 0.9 that a humanities major will change to science and of 0.2 that a science major will change to humanities. What are the long-term predictions for each major
Answer:
hence the long-term prediction for each major ; [ 1 , 1 ]
Step-by-step explanation:
Probability of A humanities major changes to Science = 0.9
P( science major changes to humanities ) = 0.2
Determine the long term predictions for each Major
The Transition matrix can be written as
[tex]\left[\begin{array}{ccc}0.1&0.9&\\0.8&0.2&\\\end{array}\right][/tex]
Find the equilibrium matrix p' of the Transition matrix above by finding the values of p, p^2 , p^3 ......... until any row of the resultant matrix
The eigen ( equilibrium ) vectors of the matrix
[tex]\left[\begin{array}{ccc}1&-1.125&\\1&1&\\\end{array}\right][/tex]
hence the long-term prediction for each major ; [ 1 , 1 ]
Consider a circle with center (2,-3) that passes through the point (5,4).
What is the equation of the described circle?
A) (x - 2)^2 + (y + 3)^2 = 58
B) (x - 2)^2 + (y + 3)^2 = 68
C) (x + 2)^2 + (y - 3)^2 = 58
D) (x + 2)^2 + (y - 3)^2 = 68
If the circle passes through the point (6,5), what is the equation of the new circle with the same center?
A) (x + 2)^2 + (y - 3)^2 = 80
B) (x + 2)^2 + (y - 3)^2 = 90
C) (x - 2)^2 + (y + 3)^2 = 80
D) (x - 2)^2 + (y + 3)^2 = 90
Answer: Part A: A. Part B: C
Step-by-step explanation:
Substitute the number into the equation of circle: (x-h)^2 + (y-k)^2=r^2
h and k are 2, -3 so you will need to change their signs.
The final thing you will do is to find the distance of center to point. Using distance formula and you will able to find the radius. Square your radius then the result will be there
What is the volume of this cereal box
Answer:
288in
Step-by-step explanation:
PLEASE HELP I DONT KNOW
Answer:
Step-by-step explanation:
In the given circle
radius (r) = 6 cm
Diameter (d) = 2 * r
= 2 * 6
= 12 cm
hope it helps :)
[tex]\huge{\textbf{\textsf{{\color{navy}{An}}{\purple{sw}}{\pink{er}} {\color{pink}{:}}}}}[/tex]D)
12cmbecause,
d= 2r
d= 2×6
d= 12cm
ThanksHope it helpsb) The university gym opens at 9 am on Saturday mornings. One Saturday morning at 8:55 am there are 15 students outside the gym waiting for it to open. Should you use the same approach from part (a) to calculate the expected number of smokers among these 15 students
Answer:
The complete question is:
At a university, 13% of students smoke.
a) Calculate the expected number of smokers in a random sample of 100 students from this university:
b) The university gym opens at 9 am on Saturday mornings. One Saturday morning at 8:55 am there are 27 students outside the gym waiting for it to open. Should you use the same approach from part (a) to calculate the expected number of smokers among these 27 students?
Part a is easy, because is a random sample, we can expect that just 13% of these 100 students to be smokers, and 13% of 100 is 13, so we can expect 13 of those 100 students to be smokers.
b) This time we do not have a random sample, our sample is a sample of 15 students who go to the gym in the early morning, so our sample is biased. (And we do not know if this bias is related to smoking or not, and how that relationship is), so we can't use the same approach that we used in the previous part.