Answer:
7.5
Step-by-step explanation:

The value of a would be 4.2, because the negatives cancel out each other.
Answer:C
Step-by-step explanation:
To calculate the cuboid's volume, use height×width×length which is 11×11×16
For the cylinder's volume, use πr²h. in this case, it is 3.14×4²×9
Add up the two answers you get and that's the solution
Step-by-step explanation:
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