Blake ewasko's charge account uses the unpaid balance method to compute the finance

charges at a monthly periodic rate of 2.15%. during the month, he charged $189.34, made a 100.00

payment, and had a $21.54 finance charge. find blake's new balance.

distance covered by pamela in 9 l of fuel = 99km

let us apply unitary method here.

distance covered by pamela in 1 l of fuel =99/9 =11 km

now let us find distance covered by pamela if she has 12 l of fuel.

distance covered in 12 l = distance covered in 1 l of fuel * 12

we know that distance covered by here in 1 l is 11 km.

so distance covered in 12 l of fuel = 11*12 = 132 km.

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