# Logarithm + exponential equation - math problems

#### Number of problems found: 38

- Exponential equation

In the set R solve the equation: ? - Exponential equation

Solve exponential equation (in real numbers): 9^{8x-2}=9 - Exponential equation

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

Solve for x: (4^x):0,5=2/64. - Log

if ?, what is b? - Exp

If ?, then n is: - Sequence

Calculate what member of the sequence specified by ? has value 86. - Coordinate

Determine missing coordinate of the point M [x, 120] of the graph of the function f bv rule: y = 5^{x} - Compound interest

Calculate time when deposit in the bank with interest 2.5% p.a. doubles. - Car value

The car loses value 15% every year. Determine a time (in years) when the price will be halved. - Geometric sequence

In the geometric sequence is a_{4}= 20 a_{9}= -160. Calculate the first member a_{1}and quotient q. - 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? - What is

What is the annual percentage increase in the city when the population has tripled in 20 years? - Geometric progression

In geometric progression, a1 = 7, q = 5. Find the condition for n to sum first n members is: sn≤217. - Demographics

The population grew in the city in 10 years from 30000 to 34000. What is the average annual percentage increase of population? - Decibel

By what percentage does the sound intensity increase if the sound intensity level increases by 1 dB? - The city 3

The city has 22,000 residents. How long it is expected to have 25,000 residents if the average annual population growth is 1.4%? - Powers 3

2 to the power of n divided by 4 to the power of -3 equal 4. What is the vaule of n? - Water lilies

Water lilies are growing on the pond and their number is doubled every day. The whole layer is covered in 12 days. How many days will it cover 8 layers? - Geometric sequence 3

In geometric sequence is a_{8}= 312500; a_{11}= 39062500; s_{n}=1953124. Calculate the first item a_{1}, quotient q and n - number of members by their sum s_n.

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Logarithm - math word problems. Exponential equation - math word problems.