Spring 2009Math 105Test #3Name: ______

Show all work for full credit. 5 points for each problem.

  1. The textbook price before tax is $87.25. Suppose the tax rate is 8%. Find the amount of tax. And also find the price-after-tax.
  1. Convert to decimal and percent:
  1. Convert to percent and simplified mixed number: 523.625
  1. Convert to decimal and simplified fraction:
  1. Out of 250 people interviewed, 120 of them are male, the rest are female. Find the ratio of male to the female in the interview. Write in simplified fraction.
  1. Find the unit rate: 460 miles for 8 hours.
  1. Solve the proportion:
  1. Compute: What is 16% of 379?
  1. Compute: What is 8.25% of 650?
  1. A brick wall 20 feet in length contains 1040 bricks. At the same rate, how many bricks would it take to build a wall 48 feet in length?
  1. Convert the following units.

a. 3 miles to feet

b. 207 inches to feet.

  1. Solve the proportion
  1. A rectangle room is 12 feet by 18 feet. What is the perimeter? What is the area?

  1. Tom purchased 3 pencils, 2 pens, and 5 erasers. A pencil costs $1.45, a pen $2.45, and an eraser $0.75. Find the total of his purchase. Find the sales tax if the tax rate is 9%. Find the total amount he needs to pay (with the sales tax).
  1. A Dell computer is priced at 500.
  2. A 15%-discount is to be applied. Find the amount of discount and the price-after-discount.
  1. An 9%-CA-tax is to be applied to the price after discount. Find the amount of tax and the final cost to pay (this is the price-after-discount-and-tax).
  1. Melanie deposits $6000 into a one-year CD-Account that pays 3% interest annually.
  2. Find the amount of interest she will get at the maturity of that CD-Account.
  1. Find the amount of money the bank will pay out.
  1. 90 is what percent of 150?
  1. Convert the following units.

a. 390 ounces to poundsb. 5 kilograms to grams

  1. A circle has diameter of 20 meters. Find the circumference. Find the area. (use
  1. At the beginning of the week, the price for a gallon of regular gasoline is $2.25. At the end of the week, it is $2.52. What is the percent of increase?