Last week Jack worked 70 hours and earned $1,260.
If he earned his regular hourly wage for the first
40 hours worked, $$1\frac{1}{2}$$ times his regular hourly wage
for the next 20 hours worked, and 2 times his regular
hourly wage for the remaining 10 hours worked, what
was his regular hourly wage?
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A$7.00
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B$14.00
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C$18.00
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D$22.00
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E$31.50