$11,700 is invested in a compound interest account paying 3.9% compounded quarterly. How much will be in the account after 18 years? Round your answer to the nearest cent.

Answer 1

evaluate
11700(1 + .039/4)^72

Answer 2

23527.940563

Answer 3

An isotope of protactinium undergoes radioactive changes at an exponential rate, having a half-life of 32,760 years. Determine the number of grams that will remain 2,000 years from a 120-gram sample using the function