### Home > CAAC > Chapter 13 > Lesson 13.IF2-S > Problem 6-31

6-31.

Barnaby's grandfather is always complaining that back when he was a teenager, he used to be able to buy his girlfriend dinner for only $1.50. Homework Help ✎

If that same dinner that Barnaby's grandfather purchased for $1.50 sixty years ago now costs $25.25, and the price has increased exponentially, write an equation that will give you the costs at different times.

How much would you expect the same dinner to cost in 60 years?

Solve 25.25 = 1.05*b*^{60} to find the multiplier.

≈ $425.04