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2 years ago

Renita started her homework at 3:45 P.M. She worked for 2 hours and 15 minutes. What time did she finish her homework?

Mathematics

1 answer:

Flauer [41]2 years ago

8 0

Answer:

6:00 or 6 o'clock

Step-by-step explanation:

1) Add 2 to the hours. So, 3+2=5

2) Add 15 minutes to 45 minutes. So, 15+45=60

3) 60 minutes is an hour, so therefore add one more hour. 5+1=6

4) There are 6 hours and 0 minutes.

So, the time that Renita finished her homework was 6:00.

Hope this helps!! ~Carley R.

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Step-by-step explanation:

Let

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we know that

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The formula to solve a quadratic equation of the form

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in this problem we have

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$a=-16\\b=40\\c=5$

substitute in the formula

$t=\frac{-40\pm\sqrt{40^{2}-4(-16)(5)}} {2(-16)}$

$t=\frac{-40\pm\sqrt{1,920}} {-32}$

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therefore

The solution is t=2.62 seconds

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