Easy math !

martina has 5 coins in her purse. the coins total 47¢. how many dimes are in her purse?
[a] 2 dimes [b] 3 nickels [c] 3 dimes [d] 2 pennies

answer: i believe c. is the answer sorry if i am wrong

step-by-step explanation:

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

: )

d will be the best answer