The number of books sold since 2005 at a book store can be modeled by the function N(t) = 5t + 36 and the price per
book can be modeled by P(t) = 0.5t2 – 3.2t + 8, where t
is the number of years since 2005.
According to this model, what is the total amount of revenue
generated by the store's book sales in the year 2011? Round
your answer to the nearest cent.

Aswimming pool has an input pump for filling the pool and an output pump for emptying the pool. the input pump can fill the pool in 3 hours, and the output pump can drain the pool in 5 hours. as you go to bed, the pool is full, but a neighbor’s kid turns on the output pump. at midnight, you awake to find the pool half empty. immediately, you turn on the input pump, but you are sleepy and forget to turn off the output pump. at what time will the pool become full?

What are the soultion(s) to the quadratic equation 40- x^2=0

How far could you drive on 50 gallons of gas