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:
one reason that Thomas Paine thinks the colonies stand a good chance against the British is because if the colonies declare independence, then they become enemies of the colonists, and that they can work with other countries.
Step-by-step explanation:
The original price of detergent is $10.83
Step-by-step explanation:
Given,
Price of detergent after discount = $6.50
It represents 40% discount from the original price.
Therefore,
60% of total value is $6.50
Let,
x represent the total value.
60% of x = $6.50
Dividing both sides by 0.6
The original price of detergent is $10.83
Keywords: variable, division
Learn more about division at:
#LearnwithBrainly
Answer:
ok ill look
Step-by-step explanation:
Answer:
see the explanation
Step-by-step explanation:
The problem could be
A person earns $20 for working 5 hours.
How much will a person earn if they work 10 hours?
using proportion
Multiply in cross
divide by 5 both sides