# Exponential function - practice problems - page 8 of 9

#### Number of problems found: 171

- Exponential equation

Find x, if 625^x = 5 The equation is exponential because the unknown is in the exponential power of 625 - The deposit

A deposit has been placed for one year at an annual rate of 4.5%. The amount rose to € 2,612.5 after one year. Find initial deposit. - Precision 3390

The price of the device is reduced by one-fifth every year. How long before the price of the device drops to one-tenth of the price? Specify years and months with precision. - Entrepreneur 2691

The entrepreneur invested euros in the bank at the beginning of 2000 for a period of 9 months with an annual interest rate of 12%. How many euros will the bank credit him with the deposit after nine months?

- The city 3

The city has 22,000 residents. How long is it expected to have 25,000 residents if the average annual population growth is 1.4%? - Sequence - 5 members

Write the first five members of the sequence a_n =(3n - (-1)^n) +2 - Population

What is the city's population with 3% annual growth if, in 10 years, the city will have 60,000 residents? - To the cinema

Jane at 8 AM got a message that all 1093 school pupils would go to the cinema. Within 20 min she said it to the three friends. Each of them again for 20 minutes said to the other three. In this way, the message spread further. At what time do all the scho - Car value

The car loses value by 15% every year. Determine a time (in years) when its price will halve.

- The city 2

Today lives 298000 citizens in the city. How many citizens can we expect in 8 years if their annual increase is 2.4%? - Half life

Determine the half-life of bismuth, when bismuth weight from the original weight of 32 g was only 2 grams in 242 minutes. - The city

At the end of 2010, the city had 248000 residents. The population increased by 2.5% each year. What is the population at the end of 2013? - Loan

Apply for a $ 15000 loan, the loan repayment period is 6 years, and the interest rate 2.8%. How much should I pay monthly (or yearly if paid yearly)? An example is for practice geometric progression and/or periodic payment for an annuity. - Deposit 3

After a year, Martin had on bank account € 1559. What was the interest rate when the initial deposit was € 1409?

- Bank

Paul put 10000 in the bank for 6 years. Calculate how much you will have in the bank if he does not pick earned interest or change deposit conditions. The annual interest rate is 3.5%, and the tax on interest is 10%. - Enterprise

The value of the annual production enterprise is 7.1 million USD. The average annual growth rate is 1.5%. What will be the value of production at the end of the fifth year? - Virus

We have a virus that lives one hour. Every half hour produces two child viruses. What will be the living population of the virus after 3.5 hours? - Simple interest

Peter put into bank $x euros deposit. After $n years on account, overall was $y euro. What was the interest rate if the bank added simple interest? - Population

The town has 159,000 inhabitants. 25 years ago, there were 158,000. How many people will live in a city in 10 years if the population's average rate is as in previous years?

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