### Home > INT1 > Chapter 6 > Lesson 6.4.2 > Problem6-144

6-144.

The current cost of a $55$-inch HDTV is $\1500$ and decreasing by $15\%$ per year.

1. What is the multiplier?

If the cost decreased by $15\%$ each year, the new cost would be $85\%$ of the previous year.

$0.85$

2. What will a $55$-inch HDTV cost in four years?

In one year the cost will be $\1500(0.85)$.
In two years the cost will be $[\1500(0.85)](0.85)$.
Continue this pattern.

3. Write an equation to calculate the cost in $n$ years. What does each of the factors in your equation represent?