Option D:

Solution:
Given expression is
.
<u>To find the product of the expression:</u>

Multiply each term of the first term with each term of the 2nd term.

Using the exponent rule: 


Arrange the terms with same power.


Hence option D is the correct answer.

168/8 = x
x=21
Thus your equation is 21x where x equals amount of hours worked and 21 equals the amount he makes per hour
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