Exponential equation + exponential function - practice problems - last page
Number of problems found: 75
- 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. - 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%?
- 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. - 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. - Interest
What is the annual interest rate on your account if we put 32790 and after 176 days received 33939.2? - Coordinate
Determine the missing coordinate of the point M [x, 11] of the graph of the function f by rule: y = 3x
- Log
If log4 x+ log8 x = log_b x, what is b? - Crystal
The crystal grows every month 1.2 permille of its mass. How many months to develop a crystal from weight 177 g to 384 g? - Sequence
Calculate what member of the sequence specified by (5n-2+15) has value 20. - Exponential equation
In the set R, solve the equation: 7 -5 +19x=4 3 -20x - Demographics
The population grew in the city in 10 years from 30000 to 34000. What is the average annual percentage increase in population?
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