will someone check my work please?A virus scanning program is checking every file for viruses.

Question

It has completed checking 40% of the files in 300 seconds. How long should it take to check all the files? 950 seconds

Gasoline accounts for 85% of the motor fuel consumed in the
United States every day. If 8,882 thousand barrels (bbl) of motor fuel is consumed each day, how much gasoline is consumed each day in the United States? Round to the nearest barrel. 7550

Jerry earned $18,500 one year and then received a 10.5%
raise. What is his new yearly salary? 20,442.50

Answer 1

1. I get a different answer.

0.4x = 300
x = ?

2. Right.

3. Right.