The value of a currency appreciated by 7.80% of its value last month and then depreciated by 7.80% this month. By what percent did the currency appreciate or depreciate over the 2-month period?

A company first six month of a certain year made 30% profit, and last six months lost 30%. What percent is the overall profit or loss at the end of the year?

You bought some stock, and then the stock price went down by 16.48% from the purchase price. By what percentage would the price have to increase for the investment to be back to the original value?

A company's total sales (in millions of dollars) t months from now are given by S(t) = 0.03³ +0.5t² + 2t +3

Enrollment at my college is increasing at a rate of 42% per decade. What is the yearly percentage increase?

At age 23​, someone sets up an IRA​ (individual retirement​ account) with an APR of 7​%. At the end of each month he deposits ​$20 in the account. How much will the IRA contain when he retires at age​ 65? Compare that amount to the total deposits made over the time period.

Tom is a baseball card collector. Older cards of great players in mint condition increase in value over time. He bought his most valuable card in 2002 for $600. Assuming it appreciates in value at a rate of 8% each year, how much is the card currently worth?

A typical combine harvester sells for $500,000.  If the value of the combine depreciates 5.59% each year, how many years will it take to lose half of it's value?   Round your answer to the nearest whole number of years. Do not include units with your answer.

The hourly wagre of workers was raised once a year and grew exponetionally from $10.00 to $12.49 in 9 years. What was the growth rate as a percentage ?

You deposited $2,500 in a bank 4.5 years ago and it’s now worth $3,300. The bank compounded interest continuously. What interest rate did you earn? Round your answer to the nearest hundredth of a percent.