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Fittoniya [83]
3 years ago
15

Haley spent 1/2 hour playing on her cell phone that use 1/9 of her battery how long does she have to play on her phone to use th

e entire battery? ​
Mathematics
1 answer:
Tju [1.3M]3 years ago
8 0

Answer:

1/2*9 = 9/2 = 4.5

.5 spends 1/9

1 spends 2/9

1.5 spends 3/9

2 spends 4/9

2.5 spends 5/9

3 spends 6/9

3.5 spends 7/9

4 spends 8/9

4.5 spends 9/9 or 1 full battery

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Answer:

A.  1/2.

Step-by-step explanation:

The ratio of the sides of a 30-60-90 triangle  is 2:1:√3   where  2 is the hypotenuse. 1 is the shortest leg and √3 is the longest leg.

In the diagram we see that the longest leg is opposite the 60 degree angle.

So the longest leg is 3.5√x and  the shortest leg ( from applying the ratios) = 3.5√x / √3.

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So sin  30 = shortest leg / hypotenuse =  3.5√x / √3 /  2 *  3.5√x / √3

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