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emmainna [20.7K]
2 years ago
8

Jenn's phone has a fully charged battery. With normal usage, he phone will last 16 hours. How long will her battery last if it o

nly charged 30%?
Can you show the work please, thank you!
Mathematics
1 answer:
Citrus2011 [14]2 years ago
6 0

The correct answer is 4.8 hours

Explanation:

This mathematical problem can be solved by using the rule of three, which involves finding an unknown value by using three related values. The process is shown below:

1. It is known a fully charged battery (100% battery) lasts 16 hours. This can be represented as 100 = 16. But it is not know how much a 30% battery last; this can be represented as 30 = x.

2. Write all the values

100 = 16

30 = x

3. Cross multiply to create an equation and solve the equation

100 x = 48

x = 480 / 100

x = 4.8

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