I think this is how you would do it
The answer in the green box should be 9.
7+49n-63 that is the answer to the question
Answer:
Option C. The volume of the sphere is equal to 
Step-by-step explanation:
we know that
The Volume of a sphere is equal to

In this problem
we have

assume

substitute

The expression from the given condition is 1/4(3a+4b).
We have given that,
The product of a quarter of 3 more than a number a and 2 times a number b.
<h3>
What is the quarter?</h3>
The quarter means divided into four equal or corresponding parts.
Therefore we get the expression from the given condition is
1/4(3a+4b).
To learn more about the expression visit:
brainly.com/question/12907094
#SPJ1