a local utility company is offering a rebate of $20 to families who install efficient light bulbs. the jones…

a local utility company is offering a rebate of $20 to families who install efficient light bulbs. the jones family spent $50 on efficient light bulbs last month and expect to save $2 on their monthly utility bill. how long will it take for the jones family to recover the setup cost?

a local utility company is offering a rebate of $20 to families who install efficient light bulbs. the jones family spent $50 on efficient light bulbs last month and expect to save $2 on their monthly utility bill. how long will it take for the jones family to recover the setup cost?

Answer

Explanation:

Step1: Calculate net cost

The Jones family spent $50 on light - bulbs and got a $20 rebate. So the net cost is the initial cost minus the rebate. $50 - 20=30$

Step2: Determine time to recover cost

They save $2 per month on their utility bill. To find out how many months it will take to recover the net cost, we divide the net cost by the monthly savings. Let $t$ be the number of months. Then $t=\frac{30}{2}=15$

Answer:

15 months