The formula for simple interest plus starting principal, where a=amount, p=principal, r=interest rate per period, and t = time, is given below.
a=p+prt
which could be used to find the time, t, if the amount, principal, and interest are known?
options:
a) a−p−pr=t
b)a−p/pr=t
c) a−pr/p=t
d)a/p+rt=t