The table shows the profit from a school book fair based on the number of books sold.

What is the rate of change for the function represented in the table?

$0.50 per book
$0.67 per book
$1.07 per book
$1.50 per book

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?

Collin did the work to see if 10 is a solution to the equation r/4=2.4

15. if the 8% tax on an item amounts to $0.96, what is the final price (tax included) of the item?