Martin will earn $350 for 28 hours of work.
Step-by-step explanation:
Given,
Amount earned in 7 hours = $87.50
Ratio of time to amount earned = 7:87.50
Let,
x be the amount earned in 28 hours.
Ratio of time to amount earned = 28:x
Using proportion;
Ratio of time to amount earned :: Ratio of time to amount earned
[tex]7:87.50::28:x\\[/tex]
Product of mean = Product of extreme
[tex]7*x=87.50*28\\7x=2450[/tex]
Dividing both sides by 7
[tex]\frac{7x}{7}=\frac{2450}{7}\\x=350[/tex]
Martin will earn $350 for 28 hours of work.
Keywords: ratio, proportion
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