the exponential function f(x) =
he invest $1000 for 5, 10, 15 years
5 years,
To find the amount of money he have , we plug in 5 for x and find out f(5)
f(x) =
 f(5) = = 1762.34
 = 1762.34
The amount of money he have after 5 years is 1762.34
10  years,
To find the amount of money he have , we plug in 10 for x and find out f(10)
 f(10) = = 3105.85
 = 3105.85
The amount of money he have after 10 years is 3105.85
15  years,
To find the amount of money he have , we plug in 15 for x and find out f(15)
 f(15) = = 5473.57
 = 5473.57
The amount of money he have after 15 years is 5473.57
 f(5) = 1762.34
 f(10) = 3105.85
 f(15) = 5473.57