Question

Can you show and tell how you got the answer

Answer 1

If the science teacher spent $65.50 on materials for the Mousetrap Car event, to find the unit cost per student you must divide the total cost by the number of students.

$65.50 ÷ 12 = 5.458 rounded to the nearest hundredth, it is C. $5.46 

Answer 2

You want the unit cost   __per__   student.
That means divide the cost by the number of students.

$65.50/12 = $5.46

Answer: C. $5.46