84 cubic inches
90 cubic inches
100 cubic inches
126 cubic inches

Answer: Second Choice. 90 cubic inches
Concept:
Here, we need to know how to calculate the volume of a rectangular prism
Volume (rectangular prism) = w · l · h
w = width
l = length
h = height
Solve:
Given information
l = 6"
w = 3"
h = 5"
Given expression
V = w · l · h
Substitute values into the expression
V = (3) (6) (5)
Simplify by multiplication
V = 18 · 5
[tex]\boxed{V_{rectangular prism}=90}[/tex]
Hope this helps!! :)
Please let me know if you have any questions