The mechanic does 4 oil changes in 2 hours. How many oil changes can the mechanic do in 8 hours?
2 answers:
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<u>ANSWER</u>
<u>EXPLANATION</u>
Given
and
We want to find
This means we substitute the function in to another function
and evaluate.
This implies that;
We expand the parenthesis to obtain;
We simplify further to obtain;
Hence the correct answer is A