Exponential function + percentages - practice problems
Number of problems found: 81
- A population
A population of fish starts at 8,000 and decreases by 6% per year. Use an exponential function to find the population of fish in 10 years. - The enrolment 2
The enrolment at a school has increased from 1400 learners to 1600 learners over 5 years. What is the percentage increase in enrolment? - Compound interest
Joel borrowed $3208.5 on November 2, 2021, at 3.6% p.a. How many days would it take for him to repay the loan if he made a payment of $ 3,720.34? Round up to the nearest day. - The sum 41
The sum of 640.00 was deposited in the first bank for five years, and the interest given was 160.00. Find the rate. - Exp decay
An element with a mass of 780 grams decays by 16.3% per minute. How much of the element is remaining after 16 minutes, to the nearest 10th of a gram? - The balance 2
If your balance at the end of 4 years is 50000, at a 5% interest rate, What was your original investment? - A company 2
A company invests 51000. After 4 years of growth at the same rate each year, the investment is worth 68920. Find the annual growth rate as a percentage. - In 1970
In 1970 the population was 24,000. In 1980 the population was 28,800. By what percent did the population increase? - Beginning 82198
At the end of the year, the lady had 360,009 CZK in her account with added interest. What was the amount at the beginning of the year if the interest rate was 10.5% pa? - Saving problem
We want to save €25,000. We deposit €3,000 annually, and the interest is 4.4% (interest tax is 19%). How many years do we have to save? - Principal 82010
Calculate the interest rate if the principal amount of 500 is 5 euros in interest in 5 months. - Increases 81991
What % of bacteria will increase hourly if the number increases from 100,000 to 370,000 in 5 hours? - Inhabitants 81581
The number of inhabitants of the city decreased in 10 years from 72800 to 56000. What is the annual decrease in the population in percentage? - Mr. Erel
Mr. Erel earns 12% compounded quarterly. He projected to collect Ᵽ500,000 after ten years. What is the amount he needs to invest? - What amount
What amount of money will be required to repay a loan of $30000 on June 1, 2008? If the loan was made on September 1, 2001, at the interest rate of 14% compounded quarterly. - Deposit for house
The current house price is $300000, with prices increasing by 3% yearly. A buyer wishes to purchase the house in 5 years. The bank requires a 10%deposit on the price of the house in order to grant a loan. How much would the buyer need to deposit each quar - Compounded monthly
Find the compound amount if Php 150,000.00 is deposited in a bank paying 9% p.a. compounded monthly for three years. - A town
A town has a population of 18000 and grows by 2% every year. What will be the population after 11 years, to the nearest whole number? - Interest 66484
The bank provides loans with an interest rate of 5% pa. How much interest will you pay if you borrow 5,000 euros for: A) 1 year B) 1/2 year C) 1/4 year D) 5 years? - Wendy
Wendy deposits R6500 into an account, paying 8% annual interest compounded monthly. How much money will be in her account after 84 months of paying 8% annual interest compounded continuously?
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