Section 2.5 Applications Involving Percents 145 29. If $1500 grows to $1950 after 5 years, find the simple interest rate. 30. If $9000 grows to $10,440 in 2 years, find the simple interest rate. 31. Perry is planning a vacation to Europe in 2 years. How much should he invest in a certificate of deposit that pays 3% simple interest to get the $3500 that he needs for the trip? Round to the nearest dollar. 32. Sherica invested in a mutual fund and at the end of 20 years she has $14,300 in her account. If the mutual fund returned an average yield of 8%, how much did she originally invest? Concept 3: Applications Involving Discount and Markup 33. A Pioneer car CD/MP3 player costs $170. Best Buy has it on sale for 12% off with free installation. a. What is the discount on the CD/MP3 player? b. What is the sale price? 34. An iPad, originally selling for $550 is on sale for 10% off. a. What is the discount on the iPad? b. What is the sale price? 35. A Sony digital camera is on sale for $400. This price is 15% off the original price.What was the original price? Round to the nearest cent. (See Example 5.) 36. The Avatar DVD is on sale for $18. If this represents an 18% discount rate, what was the original price of the DVD? 37. The original price of an Audio Jukebox was $250. It is on sale for $220.What percent discount does this represent? 38. During its first year, the Xbox 360 sold for $425 in stores.This product was in such demand that it sold for $800 online.What percent markup does this represent? (Round to the nearest whole percent.) 39. A doctor ordered a dosage of medicine for a patient. After 2 days, she increased the dosage by 20% and the new dosage came to 18 cc.What was the original dosage? 40. In one area, the cable company marked up the monthly cost by 6%.The new cost is $63.60 per month.What was the cost before the increase? Mixed Exercises 41. Sun Lei bought a laptop computer for $1800. The total cost, including tax, came to $1890. What is the tax rate? 42. Jamie purchased a compact disk and paid $18.26. If the disk price is $16.99, what is the sales tax rate (round to the nearest tenth of a percent)? 43. To discourage tobacco use and to increase state revenue, several states tax tobacco products. One year, the state of New York increased taxes on tobacco, resulting in a 32% increase in the retail price of a pack of cigarettes. If the new price of a pack of cigarettes is $6.86, what was the cost before the increase in tax? 44. A hotel room rented for 5 nights costs $706.25 including 13% in taxes. Find the original price of the room (before tax) for the 5 nights.Then find the price per night.
miller_beginning_intermediate_algebra_4e_ch1_3
To see the actual publication please follow the link above