Which step is wrong
1 pound = 100 penny
= 10 penny x 10 penny
= 1/10 pound x 1/10 pound
= 1/100 pound
= 1 penny

=> 1 pound = 1 penny

10 penny x 10 penny is incorrect = 100 penny^2

Step-by-step explanation:

We know that

1 pound = 100 penny

Factor 100 into 10 *10

               = 10 * 10 penny

10 penny * 10 penny = 100 penny^2

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

: )