Assuming this is a rectangular prism, here are the formulas for the volume and surface area.
V=l×w×h
SA=lw+lw+lh+lh+wh+wh
I didn't want to give the answer away, but I wanted to head you in the right direction. Hope this helped!
Answer:
b= 25 cents
a= 25 cents
Step-by-step explanation:
b(5)+1(a) = 1.50
V = L * W * H

= 15 * 12 * 10

= 1800

= 12 * 6 * 3

= 216

= 1800 + 216

= 2016
Hope that helps and you can remember the formula and steps for future use!
So, this means that you are multiplying both of the numerators and denominators together to get the product