Richard increase the amount of time he studied each night from a period of 55 minutes to a period of 75 minutes by which percentage will Richard increase the amount of time he studies each night A 72 1/3%
B 20%
C 20.55%
D36.36%

step-by-step explanation:

hans did not square the 40-unit side; he merely multiplied it by 2.   incorrect.

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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