Please help

A school had 900 students at the start of a school year. If there is an enrollment increase of 7% by the beginning of the year, what is the new enrollment?

A virus scanning program is checking every file for viruses. It has completed checking 40% of the files in 300 seconds. How long should it like to check all the files?

Gasoline accounts for 85% of the motor fuel consumed in the United States every day. If 8,882 thousand barrels (bbl)of mototr fuel is consumed each day, how much gasoline is consumed each day in the United States? Round to the nearest barrel.

for the first evaluate 900 + .07*900 or just do

1.07*900

for the second let the total time taken be x minutes, then solve

.4x = 300

Do the third the same way.

You need to find 7% of 900. Turn you percent into a decimal (.07) and multiply by 900. Add this answer to your original number (900) and you will have the answer.

The easiest way I can think of to do this one is to set it up like a proportion. 40% takes 300 sec. so 100% will take ?
40/300 = 100/x Multiply top to bottom and divide by the other number 300 x 100 then divide by 40.

You are looking for 85% of 8,882 so just turn the percent to a decimal and multiply. Make sure your answers make sense!

7550 bbl a day

To find the new enrollment of the school, we need to calculate 7% of the initial enrollment and then add it to the initial enrollment.

1. Calculate 7% of 900:
7% of 900 = (7/100) x 900 = 0.07 x 900 = 63

2. Add the calculated increase to the initial enrollment:
New Enrollment = Initial Enrollment + Increase
= 900 + 63
= 963

Therefore, the new enrollment of the school is 963 students.

To find out how long it will take for the virus scanning program to check all the files, we need to calculate the remaining percentage of files to be checked and then find the time required to check that remaining percentage.

1. Calculate the remaining percentage of files:
Remaining Percentage = 100% - 40% = 60%

2. Set up a proportion to find the time required. Let's assume the time required is "T" in seconds:
(40% of total time) / T = 60% of total time / 300 seconds

3. Cross-multiply the proportion:
(40/100) x T = (60/100) x 300

4. Solve for T:
0.4T = 0.6 x 300
0.4T = 180
T = 180 / 0.4
T = 450

Therefore, it will take 450 seconds for the virus scanning program to check all the files.

To find out how much gasoline is consumed in the United States each day, we need to calculate 85% of the motor fuel consumption.

1. Calculate 85% of 8,882 thousand barrels:
85% of 8,882 = (85/100) x 8,882 = 0.85 x 8,882 = 7,549.7

2. Round the result to the nearest barrel:
Rounded value = 7,550 barrels

Therefore, approximately 7,550 barrels of gasoline are consumed in the United States each day.