jade spent 1/2 of a hour playing on her phone. That used up 1/9 of her battery. How long would she have to play on her phone to use the entire battery

4.5 hours

Step-by-step explanation:

.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