I got the same question and Im pretty sure its d. 20
Answer:
2
Step-by-step explanation:
This just wants the derivative which you can solve for.
You can do this using a negative expononet or using ...the rational rule forget its name*.... you shoudl get 9000/(t+12)^2
*Quotient rule
5 can stay as is, but 5503 can be rounded to 5500 so 5500x5=27500
