Answer:
D
Step-by-step explanation:
80/400 as a decimal is 0.2
The mean is the average of the numbers: a calculated "central" value of a set of numbers.
Therefore: If the amount spent on books per month by all her classmates is leveled that amount would be $30
To calculate it: add up all the numbers, then divide by how many numbers there are
And 49 mile costs $39.20
So 1 mile costs $0.80
$0.8 x 34 = $27.20