The battery on Sarah's old computer can last for 3 3/4 hours. She bought a new computer that has a battery that can last 20% longer. How long can the battery on Sarah's new computer last? (SOMEONE PLS HELP ME WITH THIS)

Answer Actually, we need to add in the principle amount, so we would do

(1+r)p

To convert a percentage to a decimal, you divide the decimal by 100

So, 120% converted into a decimal is 1.2

In this case, r is the percent of increase, which is 20%

So, we would multiply

120% and 3 3/4 hours together:  Battery A = 4/5 remaining

Battery B = 9/20 remaining

assuming both batteries are otherwise identical (except for charge level remaining), then,

Battery A - Battery B

= 4/5 - 9/20

we need to convert both fractions to same denominator to perform the subtraction easily. Note that the Least Common Multiple for 5 and 20 is 20, hence we convert both denominators to 20,

Battery A - Battery B

= 4/5 - 9/20

= (4/5) (4/4) - 9/20

= 16/20-9/20

= 1.2

Step-by-step explanation:

2 to 10 years

Most batteries will last 2 to 10 years from the date they're manufactured. The more you leave your laptop plugged in, the longer your battery will last.

c.

step-by-step explanation:

because first you have to add the 4x, 9x, and the 7x together and you get 20x and then you add the last numbers up and you get 5and then you put the subtraction sign in there and that's how you get the answer.