QUESTION:
A battery was charged. When the charging began, it was 23 percent full. After 30 minutes of charging, the battery was 89 percent full. how fast did the battery charge and how long did it take?
Solution :
<u>Given</u>
- Initial amount of charge = 23%
- Amount after charge = 89%
<u>procedu</u><u>re</u>
Let the rate of charging be r .
r = (change in charge level) / (time interval) = (89% - 23%) / (30 min) = 2.2 % per minute
charge = (rate of charging)(time) + (initial charge)
100% = r*t + 23%
100% = (2.2 %/min)t + 23%
Solve for t and get
t = [(100 - 23) / 2.2]
Answer = 35 min
Answer:
Step-by-step explanation:
no, it will be smaller.
when you multiply a positive number by a number <1 ,the result is always smaller than original number.
All you have to do is multiply and add. 63 * 100 = 6,300. 5 * 10 = 5. 2 x 1 = 2. 6,300 + 50 + 2 = 6,352.
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Answer:
If the hands are at 12 and 3 you would have 1/3
Step-by-step explanation:
At 12 and 3 the hand will take up a third of the clock because at 12 and 3 the clock hands will have a portion of the clock taken up