Part A:
3.14 X (4)^2 X 3/3
= 50.26548246
Answer: 530.66 units²
<u>Step-by-step explanation:</u>

I would say the answer would be 105
Isolate the w
w/3 = 5
Note the equal sign. What you do to one side, you do to the other.
Multiply 3 to both sides
w/3(3) = 5(3)
w = 5(3)
Multiply
w = 15
15 is your answer for w
hope this helps