Question

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 the entire battery? ​

Answer 1

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

Answer 2

The time needed by Haley to use the entire phone battery is  $\bold{4\dfrac{1}{2}}$ hours.

Given to us,

Haley spent  $\bold{\dfrac{1}{2}}$ hour playing on her cell phone that use $\bold{\dfrac{1}{9}}$ of her battery.

Time spent playing, t = $\bold{\dfrac{1}{2}}$ hour = 30 min,

Battery consumed by phone, c = $\bold{\dfrac{1}{9}}$,

Assume that phone battery has 9 points,

therefore, points consumed by Haley when she used the phone for  $\bold{\dfrac{1}{2}}$ hour

 = 9  x  $\bold{\dfrac{1}{9}}$, = 1 point.

Thus, the time needed to consume 9 points = Total Point x Time for 1 point

                                                                          =  9 points  x   $\bold{\dfrac{1}{2}}$ hour

                                                                          =   $\bold{4\dfrac{1}{2}}$ hour

Hence, the time needed by Haley to use the entire phone battery is  $\bold{4\dfrac{1}{2}}$ hours.

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