Question

Suppose an investment of $8,200 doubles in value every 7 years. How much is the investment worth after 28 years?

Answer 1

so you know that 7 goes into 28 4 times

Answer 2

which means that the amount will double 4 times

Answer 3

so you have to calculate 8200. 2^4

Answer 4

correct i think!

Answer 5

Yeah, first double: 8200. 2
second double is the double of the first: 8200.2.2
third double is the double of the second: 8200.2.2.2
and so on

Answer 6

Whenever something doubles it's an exponential expression

Answer 7

marvelous!