The correct answers are a, c, & d. any numbers including a square root sign or pi are not rational numbers!
The answer is 10.5
Formula for rectangular prism:
L x W x H
L = 3
W = 7/4, which equals 1.75
H = 2
Area of square =
where,
is the side length of the square.


s must be positive since it is a side length, so the negative root of 81 is rejected.
Perimeter=
Perimeter=