Question

Suppose an investment of $3,800 doubles in value every decade. The function f(x) = 3,800·2x f ( x ) = 3 , 800 · 2 x gives the value of the investment after x decades. How much is the investment worth after 2 decades?

Answer 1

doubles every decade

basically

for x decades

the amount is multiplied by 2^x

so

2 decades

2^2

3800*2^2

3800*4

15200