# Logarithm - math word problems

#### Number of problems found: 49

- Logarithm

Determine the number whose decimal logarithm is -3.8. - Seating rules

In a class are 24 seats but in 7.B class are only 18 students. How many ways can student seat? (The class has 12 benches. A bench is for a pair of students.) Result (large number) logarithm and thus write down as powers of 10. - Log

if ?, what is b? - Exp

If ?, then n is: - Exponential equation

In the set R solve the equation: ? - Sequence

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

Find the gain whenever the output power is 21x the input power. - Log

Calculate value of expression log |3 +7i +5i^{2}| . - Logarithmic equation

Solve equation: log_{33}(3x + 21) = 0 - Exponential equation

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

F(x)=log(x+4)-2, what is the x intercept - Dice

How many times must throw the dice, the probability of throwing at least one six was greater than 90%? - 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? - Exponential equation

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

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

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