Temperature increase

If the temperature at 9:am is 50 degrees. What is the temperature at 5:00pm if the temperature increases 4 degrees Fahrenheit each hour?

Correct result:

t =  82 °F

Solution:

t=50+4⋅ ((12.00+5.00)−9.00)=82∘Ft=50 + 4 \cdot \ ((12.00 + 5.00) - 9.00)=82 ^\circ \text{F}

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