How do you do this question?

a. 42%

b. 16%

Step-by-step explanation:

a. According to the curve, the bottom 80% of families has about 58% of the income, so the top 20% has about 42%.

b. The bottom 60% of families have about 32% of the income, and the bottom 40% of families have about 16% of the income.  So the third quintile has about 32% − 16% = 16%.

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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