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Verdich [7]
2 years ago
15

The mean score was 72. The standard deviation was 7 percentage-points. Based on this information, what is the best

Mathematics
1 answer:
fiasKO [112]2 years ago
5 0

Answer:

the number of student that took the test is missing

I think it is 100?

79 is 1 sigms (1 standard deviation) above the mean....

1 sd is 84% ... 16% are above the 79

multiply the students that took the test by .16

Step-by-step explanation:

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Does doubling the radius of a sphere double the surface area? Explain your reasoning using an example.
Annette [7]

Answer:

yes

Step-by-step explanation:

because area of sphere equals =

4\pi \: r{2}

so if we doubled the radius the surface area will be doubled

5 0
3 years ago
Write and solve an equation to find the number n. The difference of three times a number and 4 is -19.
Law Incorporation [45]

Answer:

-5

Step-by-step explanation:

Let n be the unknown number

difference is subtraction

3n -4 = -19

Add 4 to each side

3n-4+4 = -19+4

3n = -15

Divide by 3

3n/3 = -15/3

n = -5

4 0
2 years ago
What is the smallest whole number that is a multiple of 5, 9, and 12?
Marianna [84]

Answer:180

Step-by-step explanation:

you start by finding the prime factorization of the number

5=1*5

9=3*3

12=2*2*3

the shortest way to find the factors is to find is most of them like example, at max, there are 2 two's, 2 three's and 1 five then you multiply them all together

4*9*5=180 and that's the answer

7 0
3 years ago
Read 2 more answers
You leave a 20% tip on your $70 dinner bill. How much was the tip
jonny [76]

\frac{20}{100}  \times70 =  \frac{1}{5}   \times 70 \\ = 14
hey hope this helps
5 0
2 years ago
How many ways can a girl choose a two piece outfit from 5 blouses and 7 skirts?
Tanzania [10]

Answer:

5 times 7 is 35

Step-by-step explanation:

u multiplies 7 times 5

8 0
3 years ago
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