Logarithm - practice problems - last page
Number of problems found: 98
- Coordinate
Determine the unknown coordinate of the point M [x, 54] of the graph of the function f by rule: y = 3x
- Triangle
Can an equilateral triangle have a right angle?
- Log
If log4 x+ log8 x = log_b x, what is b?
- Crystal
The crystal grows every month at 1.2 permille of its mass. How many months does it take to develop 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
- Logarithm
Determine the number whose decimal logarithm is -3.8.
- Demographics
The population grew in the city in 10 years from 30000 to 34000. What is the average annual percentage increase in population?
- Compound interest
Calculate the time when the deposit in the bank with interest 2.6% p.a. doubles.
- Radioactivity
After 548 hours decreases, the activity of a radioactive substance to 1/9 of the initial value. What is the half-life of the substance?
- Exponential equation
Solve exponential equation (in real numbers): 23x-6=9
- Big factorial
How many zeros end number 324!?
- Insurance
The house owner is insured against natural disasters and pays 0.05% annually of the value of the house 88 Eur. Calculate the value of the house. Calculate the probability of disaster if you know that 50% of the insurance is to pay damages.
- Computer revolution
When we started playing with computers, the first processor, which I remember was the Intel 8080 from 1974, with the performance of 0.5 MIPS. Calculate how much percent of a year rose CPU performance when Intel 486DX from 1992 has 54 MIPS. What would
- Logarithmic equation
Solve equation: log13(7x + 12) = 0
- Reconstruction of the corridor
Calculate how many minutes will be reduced to travel a 213 km long railway corridor, where the maximum speed increases from 120 km/h to 160 km/h. Calculate how many minutes will shorten travel time if we consider that the train must stop at 6 stations. Ea
- Dice
How many times must you throw the dice, and was the probability of throwing at least one pětky greater than 70%?
- When will I be a millionaire?
Barry monthly sends 280 euros to the bank, which he deposits bear interest of 2.1% p. A. Calculate how many months Barry must save to save 1000000 euros. Inflation, interest rate changes, or bank failures are ignored.
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