An advertisement claims that a 5-pound box of detergent will wash 20 loads of a laundry. a 5-pound box costs $3.50. a 15-pound box costs $10.00. about how much will you save per load if you buy the 15-pound box?

You save $0.008  per load if you buy the 15-pound box.

Step-by-step explanation:

IN 5 POUND BOX

Here, 5 pound box can wash 20 loads

Also, 5 pound box costs $3.50

⇒ The cost of doing 20 loads  = $3.50

⇒ The cost of 1 load  =

So, the cost of laundering 1 load here  =  $0.175

IN 15 POUND BOX

Here, 15 ( = 5 x 3)  pound box can wash 20 x 3  = 60  loads

Also, 15 pound box costs $10.00

⇒ The cost of doing 60 loads  = $10.00

⇒ The cost of 1 load  =

So, the cost of laundering 1 load here  =  $0.167

Now, Savings  = Cost per load in 5 pound box - Cost of 1 load in 15 pound

= $0.175  - $0.167

= $0.008

Hence, you save $0.008  per load if you buy the 15-pound box.

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