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Some high school students want to collect eight million pennies for charity. How many dollars is that?

Guest May 22, 2017
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\($80000\)

 

This problem is fairly simple, actually. You can set up a proportion. As a reference, 100 pennies is the equivalent of one dollar:

 

\(\frac{100pennies}{$1}=\frac{8000000pennies}{$x}\)

 

Cross multiply to solve the proportion:

 

\(100x=8000000\)   

 

Finally, divide by 100 on both sides to isolate x:

 

\(x=$80000\)  And of course, leave the units in your final answer!

TheXSquaredFactor  May 22, 2017

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