If 4x/3y =7/2 , what is the value of y/x
2 answers:
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Answer:
After 9 more minutes, her cell battery will be 80% charged.
Explanation:
Let us try to make an equation here to describe the relation between battery and time.
It is given that the battery charges at a constant rate so we can assume that
battery() ∝ Time(
)
But at t=0, the battery is already 30% charged so we rewrite the equation as follows:
-(1)
Now,
at put t=36 and b=70 in Eqn 1:
We get
The final eqn is
Put b=80
We get:
∴ It will take (45-36)=9 more minutes to reach 80% battery.
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