Answer:
The answer is 21
Step-by-step explanation:
Answer:
He will use the D box because it has a volume of

Step-by-step explanation:




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Hello! :)

We can use the following area to solve for the area of the trapezoid pictured:

Where:
h = height
b1 = bottom base
b2 = top base
Plug in the given values:

Simplify:

23 is one of the answers, and -23, because negative times negative is positive.
Hope this helps and have a nice day:)