The formula l=prt can be used to find the simple interest earned i, on a principle amount, p, with an interest rate of r, over a time of t. rewrite the formula to find the interest rate if the interest earned, time, and the principle are known a. r= p/lt b. r= pt/l c. r=l/pt d. r= lt/p

C

Step-by-step explanation:

given I = prt or

prt = I

isolate r by dividing both sides by pt

r = → C

a is the 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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