Aspool of ribbon holds 6.75 meters. a craft club buys 21 spools. what is the total cost if the ribbon sells for $2 per month

6.75 x 21 = 141.75

141.75 x $2 = $283.50

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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