Answer:
90-15x
Step-by-step explanation:
x being the number of weeks
yes
if you break it down on paper ( which btw i get why you didnt want to do it) you get 39
452.16 inches²
→ Write circle area formula
π × r²
→ Substitute in the numbers
3.14 × 12²
→ Simplify
84 I'm sure it's that I did it before