It’s A. 45.
hope this helps
Answer:
73.5
Step-by-step explanation:
To find the mean, sum the data and divide by the amount of data
mean = 
=
= 73.5
5x - 5 = x + 11
5x = x + 16
4x = 16
x = 4
72 m is the surface area because you multiply L × W × H, which is 6 × 4 ×3 = 72