Question

The cost of a cell phone varies directly with the number of minutes it is used. If it costs $52.36 to talk for

175 minutes, what is the cost to talk for 325 minutes?

Answer 1

$97.24

Explanation:

You can use a direct proportion.

175 is to $52.36 as 325 minutes is to x.

Use two ratios of minutes/dollars:

175/52.36 = 325/x

Cross multiply.

175x = 52.36 * 325

175x = 17,017

x = 17,017/175

x = 97.24

Answer: $97.24