1.Formula for the following:

The travel time for a plane that is traveling at a rate of r miles per hour for 200 miles.

2.Salary: Your monthly salary increases from $2,200 to $2,376. What percent is your raise?

3.Simple Interest: You invest $2,500 at 4.5% simple interest. How many years will it take for the investment to earn $1,000 in interest?

4.Course Grade: To get an A in a course, you need an average of 90% or better on four tests that are worth 100 points each. Your scores on the first three tests were 87, 92, and 84. What must you score on the fourth test to get an A for the course?

5.Stock Mix: You invest $5,000 in two stocks. In one year, the value of stock A increases by 9.8% and the value of stock B increases by 6.2%. The total value of the stocks is now $5,389.20. How much did you originally invest in each stock?