The monthly payment for a car lease us $530 for 18 months. the down payment is $2000. the residual value is $7000. what is the total cost of the lease

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?

Which equations represents circles that have a diameter of 12 units and a center that lies on the y-axis? check all that apply

Ijust need to see how to do this. so you don’t have to answer all of them just a step by step explanation of one.