Ms. gillespie is comparing the average score on the final math exam in her eighth grade class to the school average score. her class average is 78.6854 percent. what is this percent rounded to the nearest tenth? a. 78.8 b. 78.5 c. 78.6 d. 78.7

tenth is the first place after the decimal so we need to look at the 2nd place after the decimal to know where to round (hundreths)  If it is 5 or greater the tenths place goes up.

78.6854   we look at the 8 (it is greater than 5) so it rounds to 78.7

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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