The amount of interest earned every year with simple interest is constant. 
true or false

True.

Step-by-step explanation:

If I = prt, They are all being multiplied together, therefor being constant.

40 minutes

step-by-step explanation:

add the time and multiply by 2

(2,20) means that the 2 is 2 hours and 20 is 20$. so there both 20$ for 2 hours only the same price. like it says. so, the dunk tank and the bounce house are the same price (20$) for the same amount of time (2 hours).

hope i