Calculate the annual simple interest rate as a percent. A sum of money will be tripled in 25 years at the rate of __% per annum.

Step-by-step explanation:

Let x be the principal amount.

Simple Interest Formula:

where a = final amount

p = principal amount

r = annual interest rate

t = time taken in years.

given a = 3x, p = x, t = 25, substitute a,p and t into formula.

8%*

answer:

your answer is: c. 196 7/8 in^3.