Henry invests money in an account paying simple interest. No money is added or removed from the investment. To find the balance after a year he multiplies his current balance by 1.052. What percent simple interest does the account earn per year?

Situation: an archaelogist in turkey discovers a spear head that contains 54% of its original amount of c-14. n = noekt no = inital amount of c-14 (at time t = 0) n = amount of c-14 at time t k = 0.0001 t = time, in years find the age of the spear head to the nearest year