Respuesta :
Answer. Option B. 0.8 cents.
Solution:
With a 5-pound box of detergent will wash 20 loads of laundry, then with a 15-pound box (5*3) of detergent will wash 20*3=60 loads of laundry, and you would pay $10.00.
To wash 60 loads of laundry with 5-pound box, you would need three 5-pound box, and you would pay $3.50*3=$10.50.
Then you would save in total $10.50-$10.00=$0.50
And per load, you would save: $0.50/60=$0.008=0.008*100 cents=0.8 cents
Answer: Option 'B' is correct.
Step-by-step explanation:
Since we have given that
Cost of 5 - pound box of detergent = $3.50
Cost of 15 - pound box of detergent = $10.00
Number of loads can wash 5-pound box of detergent = 20
Number of loads can wash 15-pound box of detergent = [tex]20\times 3=60[/tex]
For 60 loads to be washed in 15 pound box of detergent costs $10.00
For 60 loads to be washed in 5 pound box of detergent costs
[tex]3.50\times 3\\\\=\$10.50[/tex]
So, total saving while using 15 pound box of detergent is given by
[tex]10.50-10.00\\\\=\$0.50[/tex]
So, total saving per load would be
[tex]\dfrac{0.50}{60}=\$0.008=0.8\ cents[/tex]
Hence, option 'B' is correct.
