Temperature 5

Temperature outside starts at 0 Fahrenheit. Over time the temperature changes at a rate of -0.6 Fahrenheit per hour. How long will it take for the temperature to reach -4.5 Fahrenheit?

Correct result:

t =  7.5 h

Solution:

$$\begin{gathered} t_1=-4.5^{\circ }\text{F } \\ {t}_0=0^{\circ }\text{F } \\ r=-0.6^{\circ }\text{F/h } \\ t=(t_1-t_0)\mathrm{/}r=((-4.5)-0)\mathrm{/}(-0.6)={\displaystyle \frac{15}{2}}={\displaystyle \frac{15}{2}}\text{ h}=7.5\text{ h} \end{gathered}$$

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Math student

well done thanku

2 years ago  Like

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