The Smith's dinner bill is $76.60. Mrs. Smith is going to leave a 20% tip. How much money will Mrs. Smith leave for the tip?
1 answer:
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When you are multiplying exponents with the same base, you can add the exponents. This is represented as:
In our case we are multiplying exponents with the same base 8 and exponents -7 and 5. The sum of -7 and 5 is -2, so our answer is .