Mathematics College

Let's say a student scored 33 on a math achievement test for which scores are normally distributed with mean
43 and standard deviation 10.
What proportion of students finished worse than her?

Answers

Answer 1

Answer:

15.87%

Step-by-step explanation:

We are given;

x¯ = 33

μ = 43

σ = 10

Let's first find the z-score from the formula;

z = (x¯ - μ)/σ

Thus;

z = (33 - 43)/10

z = -10/10

z = -1

From the table attached the p-value at z = -1 is p = 0.15866 ≈ 0.1587 = 15.87%

Thus, proportion of students finished worse than her is 15.87%

Let's Say A Student Scored 33 On A Math Achievement Test For Which Scores Are Normally Distributed With

Related Questions

The tide is the regular rising or falling of the ocean’s surface. This is due in large part to the gravitational forces of the moon. The following table represents water level of the tide off the coast of Kings Point, N.Y., for a 24 hour period, February 9th through February 10th of 2009.

Hour
Measurement in feet above the average low tide
0
-0.98
2
5.83
4
7.78
6
7.34
8
2.33
10
-0.47
12
-0.21
14
5.32
16
8.83
18
8.31
20
3.80
22
-0.28
24
0.53

Plot the data points given in the table using hour as the independent variable. Does this data indicate that a sine regression may be appropriate in this case? Explain.
a.
Yes, in the scatterplot the wavelike behavior is apparent although not precise.
b.
Yes, the scatterplot shows an increase over time.
c.
No, there is no correlation between the points.
d.
No, the scatterplot depicts a hyperbole.

Answers

Answer:

Option A

Step-by-step explanation:

Points plotted.

See the graph attached.

Correct choice is:

A. Yes, in the scatterplot the wavelike behavior is apparent although not precise

OPTION A

#CcarryOnLearning

8 (3x-6) = 6(4x + 8)

Answers

Answer:

There is no solution to make it true.

Step-by-step explanation:

First you expand
24x - 48 = 24x + 48
Then you cancel 24x on both sides
-48 = 48
Since -48 = 48 is false , there is no solution

A family goes to a restaurant. When the bill comes, this is printed at the bottom of it:
Gratuity Guide showing 15%=4.89, 18%=5.87, and 20%=6.52

How much was the price of the meal?

Someone help I need the answer immediately.

Answers

The price of the meal is $32.60 I think
15% of x = $4.89
0.15x = 4.89
x = $4.89/0.15 = $32.60

If y = 24 when x = 6, find y when x = -4 answer

Answers

Answer:

-16

Step-by-step explanation:

24/6 = y/-4

6y = -96   cross multiply

y=-16

Graph the line that passes through the points (-4, 6) and (-8,5) and determine the equation of the line.​

Answers

Y=mx+c
For this one you compare the difference between each point.
When x=-4 y=6
And when x=-8 y=5
So when x=0 y=7 therefore substitute c with 7
So y=mx+7
6=m x -4 +7
-1=m x -4
m=-1/4
Answer: y=-1/4x+7

How do I find the volume of this pyramid

Answers

Answer:

10*10*12 = 120 ÷ 3 = 40

Step-by-step explanation:

The formula to find a pyramid's volume is

V = [tex]\frac{l*w*h}{3}[/tex] (length 'times' width 'times' height, divided by 3)

Find the third, fifth, and eleventh terms of the sequence described by the rule.
A(n) = - 6+ (n - 1)(6)
A(3)= ?

Answers

Answer:

A(3) = 6

A(5) = 18

A(11) = 54

PLS MARK AS BRAINLIEST

In Dylan's grade, there are 80 students. Currently, 40% of them are enrolled in health. How many students are enrolled in health?

Answers

32 students

Please mark brainliest !

Answer:

32

Step-by-step explanation:

Convert 40 percent to a decimal, which is 0.4, then multiply 0.4 with 80 and you get 32.

Decide whether a discrete or continuous random variable is the best model for each of the following variables:

a. The time for a computer algorithm to assign an image to a category.
b. The number of bytes used to store a file in a computer.
c. The ozone concentration in micrograms per cubic meter.
d. The ejection fraction (volumetric fraction of blood pumped from a heart ventricle with each beat).
e. The fluid flow rate in liters per minute.

Answers

Answer:

a) Continuous

b) Discrete

c) Continuous

d) Continuous

e) Continuous

Step-by-step explanation:

Discrete variable:

Countable amounts(0, 1, 2, 3,...)

Continuous variables:

Can be decimal values.

a. The time for a computer algorithm to assign an image to a category.

Time can have decimal values, so continuous

b. The number of bytes used to store a file in a computer.

The number of bytes is never decimal, so discrete

c. The ozone concentration in micrograms per cubic meter.

Can be decimal value, so continuous

d. The ejection fraction (volumetric fraction of blood pumped from a heart ventricle with each beat).

Can be decimal value, so continuous

e. The fluid flow rate in liters per minute.

Can be decimal value, so continuous

What best describes the expression y over 4? (5 points)
a. Some number divided by 4
b. Some numbers times 4
c. 4 more than some number
d. 4 less than some number

I prefer you 100% know the answer and not “think” this is very important!!

Answers

A because it would be y divided by 4 and you would solve for what y is

Answer:

a

Step-by-step explanation:

PLEASE PLEASE HELP!!!

Answers

Answer:

398,765 books were sold

Step-by-step explanation:

How to get the answer:

1) Identify the given

  32,300 is percentage

  8.1 % is rate

  base (b) is missing

2) Solve

   b= p/r

   b= 32,300 / 8.1% or 0.081

   b= 398,765

3) Check

   398,765 x 8.1% = 32,299.97 or 32,300

hayden and jamie completed 20 math problems together, jamie completed 2 more than twice the number that hayden completed. Let p represent the number of math problems hayden completed. Write an equation that can be used to find the number of math problems that jamie completed.

Answers

Answer:

2p+2+p = 20

Step-by-step explanation:

Let p represent the number of Math problems Hayden completed.

Let 2p+2 represent the number of Math problems Jamie completed.

Next, we have to add them together so that the total Math problems they completed will be equal to 20.

Let's solve.

2p+2+p = 203p+2 = 203p = 20-23p = 18p = [tex]\frac{18}{3}[/tex]p = 6

Therefore, Hayden completed 6 Math problems.

Next, we have to get how many problems Jamie completed.

Let's solve.

2p+2 = ?2(6)+2 = ?12+2 = ?14

Therefore, Jamie completed 14 Math problems.

Let's check.

2p+2+p = 2014+6 = 2020 = 20

It's correct!

can anyone pls help me with this question I'm stuck ​

Answers

Answer:

I think 24

let b=3

l=4

and h=2

Answer:

864

Good luck!

Four friends go to dinner. Each chooses a different meal. When the check comes, they decide they will each pay the same amount. If the costs of the meals (including tax and tip) were $12.20, $11.00, $8.50, and $7.50, what should each friend pay so they cover the whole bill?​

Answers

Answer: Each friend should pay $9.80

Step-by-step explanation: First add up all their checks, then divide them by 4 (4 because there 4 friends) to get the amount each friend needs to pay.

$12.20 + $11.00 + $8.50 + $7.50= $39.20

39.30 / 4 = $9.80

A triangle has two sides that measure 5 cm and 7 cm. Which of the following CANNOT be the measure of the third side? A 3 cm B 5 cm C 7 cm D 12cm

Answers

Answer:

D

Step-by-step explanation:

Saying the number of |`s is the number side and |<|||>|| then for a triangle i can say |+||>|||

Please help with my question

Answers

Answer:

[tex]5\frac{5}{6}[/tex]

Step-by-step explanation:

The problem above requires the use of mathematical operation with mixed fractions. In order to do this, you have to convert the mixed fractions into improper fractions first.

Let's convert.

[tex]3\frac{1}{2}[/tex] = [tex]\frac{7}{2}[/tex][tex]1\frac{2}{3}[/tex] = [tex]\frac{5}{3}[/tex]

Next, you have to multiply the fractions by multiplying the numerators with each other and the denominators with each other.

Let's solve.

[tex]\frac{7}{2}[/tex] x [tex]\frac{5}{3}[/tex] = [tex]\frac{35}{6}[/tex]

Since [tex]\frac{35}{6}[/tex] is an improper fraction and the choices above are mixed fractions, you have to convert it.

Let's convert.

[tex]\frac{35}{6}[/tex] = [tex]5\frac{5}{6}[/tex]

Therefore, the answer is [tex]5\frac{5}{6}[/tex]

how can you find the area of a circle? give me a good explanation please, ty!​

Answers

Answer:

The area of a circle is pi times the radius squared (Area = pi radius²).

Step-by-step explanation:

The circumference of a circle is the linear distance of a circle's edge. It is the same as the perimeter of a geometric figure, but the term 'perimeter' is used exclusively for polygons.

The following equation describes the relation between the circumference and the radius R of a circle:

C = 2πR

Where π is a constant approximately equal to 3.14159265..

How to find the circumference of a circle

Determine the radius of a circle. Let's assume it's equal to 14 cm.

Substitute this value to the formula for circumference: C = 2 * π * R = 2 * π * 14 = 87.9646 cm.

You can also use it to find the area of a circle: A = π * R² = π * 14² = 615.752 cm².

Finally, you can find the diameter - it is simply double the radius: D = 2 * R = 2 * 14 = 28 cm.

Use our circumference calculator to find the radius when you only have the circumference or area of a circle.

Answer:

Use this formula: A = π r²

Step-by-step explanation:

A = π r²

What does A = π r² mean? :

(Area = Pi x Radius²)

π = Pi (3.14)

² = squared

Hope this helps! :)

1. A recipe for 6servings of Lasagna uses 16 ounces of Italian Sausage.

a. If the recipe were to be made for 15 servings, how many ounces of Italian Sausage would be needed?

b. How many servings of Lasagna can be made with 24 ounces of Italian Sausage?

Answers

Answer:

a)  40 oz

b)  64 oz

Step-by-step explanation:

a) you can use the ratio of 6/16 = 15/x and cross-multiply

b) you can use the ratio of 6/16 = 24/x and cross-multiply

Simplify the expression below.
5(7x+4y+1)+2(8x+3y+6)
help plz!

Answers

Answer:

51x+26y+17

Step-by-step explanation:

Answer:

51x + 26y + 17

Step-by-step explanation:

distribute

5(7x) + 5(4y) + 5(1) + 2(8x) + 2(3y) + 2(6)

35x + 20y + 5 + 16x + 6y + 12

51x + 26y + 17

Will give brainliest
What is the missing reason in step three?
A.SAS
B.SSS
C. Triangle sum theorem
D. CPCTC

Answers

wouldn’t it be B. SSS

How do you covert 40% into a fraction ?

Answers

Answer:

2/5

Step-by-step explanation:

how many perfect square are there between 1,000,000 and 9,000,000?​

Answers

Answer:

1999

Step-by-step explanation:

The square root of 1,000,000 = 1,000.

The square root of 9,000,000 = 3,000.

This means that the number of perfect square will be every number from 1,000^2 to 3,000^2. To find how many numbers that is, just do 3000-1000 = 2000, and then subtract one because otherwise you would be counting the 3000^2 which you don't want to do (it asks how many perfect squares are between the two numbers).

2000 - 1 = 1999.

The number of perfect squares between the values 1,000,000 and 9,000,000 would be 1999

Taking the square root of the boundaries :

√1,000,000 = 1000

√9,000,000 = 3000

The number of perfect squares would be :

[(√9,000,000 - √1,000,000) - 1]

[3000 - 1000] - 1

2000 - 1

= 1999

Hence, the number of perfect squares would be 1999.

Learn more : https://brainly.com/question/7287026


Plz guys help I need help

Answers

The answer would be 56 pounds
56 pounds your welcome

Find the equation of a line perpendicular to x=−4 that contains the point (−3,4). Write the equation in slope-intercept form.

Answers

Answer:

y=4

Step-by-step explanation:

We recognize x=−4 as a vertical line, so its perpendicular will be horizontal. The equation of the horizontal line containing the point (−3,4) is given by y=4.

The slope-intercept form of a line perpendicular to x=−4 that contains the point (−3,4) is y = 4.

What is the slope of a line that is perpendicular to the other line?

The slope-intercept form of a line is y = mx + c.

Here, m = slope and c = y-intercept of the line.

The equation of the given line is x = - 4

Therefore, the given line is a vertical line.

Now, the line that is perpendicular to the line x = - 4, is a horizontal line.

Now, the horizontal line that passes through the point (- 3, 4) is y = 4.

Learn more about the slope-intercept form of a line here: https://brainly.com/question/15000427

#SPJ3

Let C be the first quadrant portion of the circle of radius 3 centered on the origin. Find the line itegral for x^2+y^2 over C.

Answers

YX equals +2 squared minus -17 is approximately the answer of the origin

In a first-aid kit the ratio of large bandages to
small bandages is 5 to 3. Based on this ratio,
how many large bandages are in the kit if there
are a total of 80 bandages?
A. 50
B. 48
C. 16
D. 40

Answers

The answer is A. 50
Hope this helps :)

Can someone help me with these 2 questions please???

Answers

Answer:

See step-by-step explanation.

Step-by-step explanation:

For the first question, you simply put an EMPTY circle above 2 and draw an arrow from it all the way down to -3. The reason why we put an empty circle is because there is no equal sign below it.

For the second question, you put a FILLED circle above 4 and draw an arrow from it all the way down to -3. The reason why we use a filled circle is because x is less than OR equal to 4.

HURRY!! 8.1=8w- 17.5. Solve for w​

Answers

W= 3.2

Need explaining?
8.1=8w-17.5 solve for W=3.2

Find the degree measure of the indicated angle.
?
40°
80°

Answers

Answer:

60

because you need to add the number to get 180 so I would be 80+20 = 120+60=180 I hope it helps!

The graph below represents a function.

what are the rate of change and the initial value of the function represented by the graph

A.the rate of change is 3 and the initial value is 5

B.the rate of change is 1/3 and the initial value is 5

C.the rate of change is 5 and the initial value is 3

D.the rate of change is 5 and the initial value is 1/3​

Answers

Answer:

B

Step-by-step explanation:

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