Problem Solving RIT 231 240

Problem Solving – RIT 231 – 240

1. Which letter in the word, “probabilities” would you expect a computer to randomly pick most often?

A. b B. s C. i D. o E. t

2. The elevator in the Empire State Building went up 3 floors, down 5 floors, up 2 floors, and then down 6 floors. If it ended on the 4th floor, on which floor did it begin?

A. 13th floor B. 15th floor C. 8th floor D. 10th floor E. 2nd floor

3. Solve for x.

4x + 1 = 2x – 7

A. x = 4 B. x = -6 C. x = -4 D. x = 3 E. x = -3

4. Which expression correctly represents the formula to solve the following problem?

Lisa is 6 years older than Mary. The sum of their ages is 38 years. How old is Mary?

A. x + y = -38 B. x – 38 = x + 6 C. L + M = 38 D. 2x + 6 = 38 E. x – 6 = 38 5. Interest formula: I = prt

How much interest is earned in two years on $200 in a bank account at an interest rate of 6%?

A. $6 B. $24 C. $12 D. $2.40 E. $8

6. Find the missing number in this pattern: 3, 9, 27, ___, 243

A. 30 B. 36 C. 54 D. 81 E. 124

7. If the distance from Idaho Falls to Salt Lake City measures 25 inches on a map with a scale of 1 inch = 10 miles, how many miles is it from Idaho Falls to Salt Lake City?

A. 250 miles B. 10 miles C. 25 miles D. 1,000 miles E. 500 miles

8. If Jason mows fifteen lawns he will earn enough money to buy a bicycle. Suppose Jason has mowed twelve lawns. What can you determine?

A. Jason has enough money for his bike. B. Jason has enough money to buy a bike and a helmet. C. Jason needs to mow one more lawn in order to buy a bike. D. Jason needs to mow three more lawns in order to buy the bike. E. Jason needs to mow eight more lawns in order to buy a bike. 9. A $30.00 pair of jeans is discounted 20%. If sales tax is 5%, what will be the final price of the jeans?

A. $25.20 B. $22.80 C. $24.00 D. $28.35 E. $22.80

10.Identify the correct equation for the solution:

A. 3x + 4 = 19 B. 2y = 4 C. 3 – x = 10 D. x + 17 = 10 E. x + 7 = x – 9

11.A store has a sale in which all items are on sale for 20% off. The tax at the store is 5%. Which expression models the cost (c) for an item with the original price (p)?

A. c = [p – (.20)p] [1.05] B. c = (.20) (1.05)p C. c = [p + (.20)p] [1.05] D. c = [p – 20p] (.05) E. c = [p – 20p] 5