51. Stephanie has a rectangular graph 10 inches wide and 8 inches high that she needs to paste into a lab report for her science class. Stephanie will use a photocopy machine repeatedly to reduce the size of her graph. With each reduction, the width and height will each be reduced to 80% of what they each were. What is the minimum number of reductions using the photocopy machine that will allow the graph to fit in a space 3.5 inches high?

Answer and Explanation

Your Answer is

Correct Answer is D

Explanation

Assuming that n times are required, the inequality 8× (0.8)n≤3.5 can be listed, so choose D