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Darya [45]
2 years ago
15

SOMEONE PLEASE PLEASE HELP PLEASE WHATS THE CORRECT ANSWER

Mathematics
1 answer:
WARRIOR [948]2 years ago
3 0

Answer:

Third answer

Step-by-step explanation:

The filled in dot at 4 means that 4 is included, therefore everything less than and including 4 is the value of r.

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Answer:

<h2><em><u>Option</u></em><em><u> </u></em><em><u>C</u></em></h2>

Step-by-step explanation:

<em><u>Here</u></em><em><u>,</u></em>

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a \:  =  \: 4\pi {r}^{2}

<em><u>Then</u></em><em><u> </u></em><em><u>for</u></em><em><u> </u></em><em><u>'</u></em><em><u>r</u></em><em><u>'</u></em><em><u>,</u></em>

=  > 4\pi {r}^{2}  = a

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=  > r =   \sqrt{\frac{a}{4\pi} }

=  > r =  \frac{1}{2}\sqrt{  \frac{a}{\pi} }

<em><u>Hence</u></em><em><u>,</u></em>

<em><u>Option</u></em><em><u> </u></em><em><u>C</u></em><em><u> </u></em><em><u>is</u></em><em><u> </u></em><em><u>correct</u></em><em><u> </u></em><em><u>.</u></em>

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First part is easy.

180 rows with 328 per row is 180x328=59,040

Now he says 15 hours. So 59040/15=3936
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