Which expression is equivalent to 8^-3 times 8^-9? a. 1/8^27
b. 8^-12
c. 8^27
d. 1/8^-12

B

Step-by-step explanation:

Multiplying numbers with exponents rule:

Explanation of rule: keep the base the same and add the exponents. Keep in mind this rule only works when the base of both numbers are the same.

Applying rule: 8^-3 x 8^-9

keep base as 8 and add the exponents

b is the answer

on monday rodney ate 1/4th of the sandwich = 3/12

on tuesday he ate 1/3rd of the sandwich = 4/12

therefore in total he has eaten = 3/12 + 4/12 = 7/12

thus we can say that he has eaten 7/12 of the sandwich on monday and tuesday alltogether.

happy to

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