Kellie currently has an average of 75 in her English class. If her grade is the mean of all her assignments, what would a grade of 95 do to her average? A Her mean grade will go down.

B Her mean grade will go up.

C Her mean grade will stay the same.

D There is not enough information.

step-by-step explanation:

no, her answer is not correct.   we square the lengths of all sides and then determine whether the pythagorean theorem holds here:

9² + 15² = 306.   this is not equal to the square of the longest side ( that square being 395.   answer c is correct.

the answer is b: 18

step-by-step explanation:

use the pythagorean theorem to .

a^2+b^2=c^2

plug 18 for "r"

the 2 legs are 18 and 24

18^2+24^2=c^2

324+576=c^2

900=c^2

c=30

30-12=18

18 is the radius

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$649.60

step-by-step explanation: