有一道GRE的数学题求详细讲解:RTThe advertisd rate for roaming harges is 0.002 cents pe second.What is that in dollars per hour?0.072

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有一道GRE的数学题求详细讲解:
RT
The advertisd rate for roaming harges is 0.002 cents pe second.What is that in dollars per hour?
0.072

就直接进行单位换算就好啦,1 dollar=100 cents,1 hour=3600 second
0.002 cents pe second=0.002/100*3600=0.072 dollars per hour

0.002%*36000=0.072

0.002*60*60=0.072

1 hour=60minutes=3600seconds
0.002*3600=7.2cents=0.072dollars

0.002*60=0、072