Tony has 80 cents. If balloons cost 18 cents, what is the greatest number of balloons he can buy
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Remember that an exponent means repeated multiplication.
The exponent of 4 means you have four 's mutiplied together:
And then each exponent of 2 inside means you have two 's multiplied inside each set of parentheses.:
There are 8 b's there when you expand this out.