The derivative here is what you get when you bring the exponent down as the coefficient (i.e. the 3) and subtract the exponent by 1. In this case, the answer will be 3x^2.
Answer:
She spends:
2980.83 hours reading in a year,
3406.67 hours listening to music in a year,
and 3650 hours listening to podcasts in a year.
Step-by-step explanation:
Let's multiply each activity she does by 14 and take it to a year:
-Reading

She spends 2980.83 hours reading in a year.
-Listenign to music:
She spends 3406.67 hours listening to music in a year.
-Listenign to podcasts:
She spends 3650 hours listening to podcasts in a year.
I hope it helps you!
119 * .09 = 10.71
119+10.71= 129.71
129.71 * .22 = 28.54
129.71+28.54= 158.25
the answer closest to this is $156, so that is your answer.