Maria called her best friend in Missouri. She spent 1 hour and 15 minutes on the phone. If the phone company charges $0.15 per minute for long distance phone calls, how much did the phone call cost?

2 Answers
Barney V.
Apr 17, 2018

#$11.25#

Explanation:

1 hour=60minutes#+15=75#minutes

#:.1min.=$0.15#

#:.75min.=0.15xx75=$11.25#

Rachel
Apr 17, 2018

The cost is #0.15# for every minute

in "math language" we have

#C = 0.15t#

We need to get our time into minutes, instead of #1# hr and #15# min.

Well, #1# hour is #60# min. So #60# min plus #15# min is #75# minutes

So now we plug #75# in for #t# in the equation

#C = 0.15 xx 75#

#C = 11.25# dollars

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