C would be the correct answer with the given information, because with a constant 6% inflation rate the cost of tuition would total in the given years to $99,511
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Answer:
Step-by-step explanation:
Multiply both sides of the equation by 99, the least common multiple of 9,39,3.
m + 6 =21
Subtract 6 from both sides.
m = 21 - 6
Subtract 6 from 21 to get 15.
m=15