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weqwewe [10]
3 years ago
5

CALCULATE PR :) Merry Xmas btw

Mathematics
1 answer:
weeeeeb [17]3 years ago
4 0

Answer:

PR = 7.9

Step-by-step explanation:

By sine rule:

\frac{12.5}{ \sin \: 66 \degree}  =  \frac{PR}{ \sin \: 37 \degree}  \\  \\  \frac{12.5}{ 0.9135454576}  =  \frac{PR}{ 0.6018150232}  \\  \\ PR =  \frac{12 \times 0.6018150232}{0.9135454576} \\  \\ PR =  \frac{12 \times 0.6018150232}{0.9135454576}  \\  \\PR =  \frac{7.22178028}{0.9135454576}  \\  \\ PR = 7.90522269 \\  \\ PR \approx \: 7.9

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A function that gives the amount that the plant earns per man-hour t years after it opens is \mathrm{A}(\mathrm{t})=80 \times 1.05^{\mathrm{t}}

<h3><u>Solution:</u></h3>

Given that  

A manufacturing plant earned $80 per man-hour of labor when it opened.

Each year, the plant earns an additional 5% per man-hour.

Need to write a function that gives the amount A(t) that the plant earns per man-hour t years after it opens.  

Amount earned by plant when it is opened = $80 per man-hour

As it is given that each year, the plants earns an additional of 5% per man hour

So Amount earned by plant after one year = $80 + 5% of $80 = 80 ( 1 + 0.05) = (80 x 1.05)

Amount earned by plant after two years is given as:

=(80 \times 1.05)+5 \% \text { of }(80 \times 1.05)=(80 \times 1.05)(1.05)=80 \times 1.052

Similarly Amount earned by plant after three years =80 \times 1.05^{t}

\begin{array}{l}{\Rightarrow \text { Amount earned by plant after } t \text { years }=80 \times 1.05^{t}} \\\\ {\Rightarrow \text { Required function } \mathrm{A}(t)=80 \times 1.05^{t}}\end{array}

Hence a function that gives the amount that the plant earns per man-hour t years after it opens is \mathrm{A}(t)=80 \times 1.05^{t}

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