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?

$97.24

Step-by-step 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

$97.24

step-by-step explanation:

the true statements are:

r = set of real numbers

n = set of natural numbers, 1,2,

w = n u{0} = {0,1,}