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Phoenix [80]
3 years ago
7

The scores on an entrance exam to a university are known to have an approximately normal distribution with mean 65% and standard

Mathematics
1 answer:
marin [14]3 years ago
6 0

Answer:

-0.704 (corrected to 3 significant figures).

Step-by-step explanation:

Standardized score = (actual score - mean) / standard deviation

Standardized score = (60% - 65%) / 7.1%

= -0.704 (corrected to 3 significant figures).

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LeRoy cut a length of string into 30
sukhopar [10]

Answer:

390 inches long

Step-by-step explanation:

The string = x

\frac{x}{30} = 13

30 (\frac{x}{30} ) = 30(13)

    x = 390 inches

3 0
3 years ago
Write all the factors of 27.<br> Use commas to separate them.
UkoKoshka [18]

Answer:

1,3,9,27

Step-by-step explanation:

5 0
3 years ago
Here's a list of numbers : 13, 27 ,81, 21 ,43, 48 ,23, 39 ,45 From this list, write down a.) The even number b.) The square numb
vazorg [7]

Answer:

48 is the even number

81 is the square number

13 43 23 are the prime numbers

4 0
3 years ago
Read 2 more answers
The area of a rectangle is represented by the function A = n^3 - 6n^2 - 8n + 48.
aliya0001 [1]

Answer:

P = 2(n - 6) + 2(n^2 - 8)

Step-by-step explanation:

Remembering that Area = Length times Width, we factor the given function

A = n^3 - 6n^2 - 8n + 48 in the expectation that the resulting factors represent the length and width respectively:

A = n^3 - 6n^2 - 8n + 48 factors as follows:

A = n^2(n - 6) - 8(n - 6), or A = (n - 6)(n^2 - 8)

We can label '(n - 6)' "width" and '(n^2 - 8'

length.

Then the perimeter, P, of the rectangle is P = 2(length) + 2(width). which works out here to:

P = 2(n - 6) + 2(n^2 - 8)

5 0
2 years ago
In a 45-45-90 right triangle, what is the ratio of the length of one leg to the
balandron [24]
A 1:12 is the answer for this question
5 0
3 years ago
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