Answer:
-31=8
Step-by-step explanation:
136 ft^2
Surface area = 2 [ (l*w) + (l*h) + (w*h) ]
= 2 [ (8*3) + (8*4) + (4*3) ]
= 136 ft^2
The solution is in the attached file
The child's weight increase by 66.7%
