Jill paid for a $1,200 vacation by using a credit
card with an 18% interest rate. In order to pay
the card off in 12 months, Jill will need to make
payments of $110.02 each month. Calculate the
total cost of repayment as well as the amount of
interest Jill will pay.

$1,416

Step-by-step explanation: you add 18% of 1,200 to 1,200

we know that

applying the law of sines

°

so

∠j=18°

∠k=29°

∠l=180-(18+29)=133°

the answer part a) is

the measure of angle k is  ≈29°

part b)  the measure of angle k could also be

(180-29)=151°

so

∠j=18°

∠k=151°

∠l=180-(18+151)=11°

the answer part b) is

the measure of angle k could also be 151°

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