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Greeley [361]
3 years ago
15

Janine and Laura both took a standardized math test. The test scores were normally distributed with a mean of 75 and a standard

deviation of 11. Janine earned a score of 76, whereas Laura earned a score of 89.
About what percentage of people had a score between Janine's and Laura's scores?

a) 30%
b) 43%
c) 80%
d) 36%
Mathematics
1 answer:
victus00 [196]3 years ago
6 0

About what percentage of people had a score between Janine's and Laura's scores?

Answer:

Its D) 36%

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#6 how to solve multi-step equations
Aloiza [94]
17+3f=14
3f= 14-17
3f/3= -3/3
f=-1 .
4 0
3 years ago
Michael solved this inequality as shown:
Ludmilka [50]

Answer:

D.

Step-by-step explanation:

Becuase in order to get addition property

you need to add 2 to -8 and bam its 6

hoped it helped

8 0
3 years ago
67. The Goldbach Conjecture. Recall that a prime number is a
Korvikt [17]

Answer:

<u>Test the conjecture for 10 even numbers</u>

10 = 3 + 7

12 = 5 + 7

14 = 7 + 7

16 = 5 + 11

18 = 5 + 13

20 = 7 + 13

22 = 11 + 11

24 = 11 + 13

26 = 13 + 13

28 = 11 + 17

<u>Do you think the conjecture is true? Why or why not?</u>

I believe the conjecture is true because the sum of two odd numbers is an even number and you can find two prime odd numbers for every even number whose sum is that even number.

4 0
3 years ago
The perimeter of a particular square and the circumference of a particular circle are equal. What is the ratio of the area of th
Tasya [4]

Ratio of the area of the square to the area of the circle is \frac{\pi}{4} : 1

In terms of fraction \frac{\pi}{4}

<em><u>Solution:</u></em>

Given that perimeter of a particular square and the circumference of a particular circle are equal

To find:  ratio of the area of the square to the area of the circle

Let the side of square be "a" and radius of circle be "r"

<em><u>The perimeter of square is given as:</u></em>

Perimeter of square = 4a

<em><u>The circumference of circle is given as:</u></em>

Circumference of circle = 2πr

From given,

perimeter of a particular square and the circumference of a particular circle are equal

perimeter of a particular square = circumference of a particular circle

4a = 2 \pi r\\\\a = \frac{\pi r}{2}

We need to find the ratio of the area of the square to the area of the circle.

We know that,

\text{ Area of the square }= a^2\\\\\text{ Area of the circle }= \pi r^2

Ratio of area of square to area of circle = a^2 : \pi r^2

Substituting the value of a = \frac{\pi r}{2} in above ratio,

Ratio of area of square to area of circle = (\frac{\pi r}{2})^2 : \pi r^2

On reducing to lowest terms we get,

⇒ \frac{\pi^2 r^2}{4} : \pi r^2 = \frac{\pi}{4} : 1

In terms of fraction we get,

\frac{\pi}{4} : 1 = \frac{\frac{\pi}{4}}{1} = \frac{\pi}{4}

Thus ratio of the area of the square to the area of the circle is \frac{\pi}{4} : 1

3 0
4 years ago
Are these lines parallel or not: L1: (1,2), (3,1), and L2: (0,-1), (2,0)
Phoenix [80]

First find the slope of the first line

L1

m = ( y2-y1)/(x2-x1)

m = ( 1-2)/(3-1)

= -1/2

Now find the slope of the second line

L2

m= ( y2-y1)/(x2-x1)

= ( 0 - -1)/(2 -0)

= (0+1)/(2-0)

= 1/2

Parallel lines have the same slope

These lines do not have the same slope, they are different by a negative sign.

These lines are not parallel.

5 0
2 years ago
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