Question

The formula for the amount with simple interest is A = P(1 + rt). Find r, if A = 224, P = 200, and t = 2.
r = 0.6
r = 0.12
r = 0.06
r = 0.012

Answer 1

A=p(1+rt)
224=200(1+r2)
224=200+200r2
224-200=200r2
4=200r2
4/200=r2
1/50=r2
1/50 times 2=r
1/25=r