# 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:
• Powers 3 2 to the power of n divided by 4 to the power of -3 equal 4. What is the vaule of n?
• Sequence Calculate what member of the sequence specified by ? has value 86.
• Log Calculate value of expression log |3 +7i +5i2| .
• Exponential equation Solve for x: (4^x):0,5=2/64. 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 In the set R solve the equation: ?
• Logarithmic equation Solve equation: log33(3x + 21) = 0
• What is What is the annual percentage increase in the city when the population has tripled in 20 years?
• Intercept with axis F(x)=log(x+4)-2, what is the x intercept
• Gain Find the gain whenever the output power is 21x the input power.
• Dice How many times must throw the dice, the probability of throwing at least one six was greater than 90%?
• Car value The car loses value 15% every year. Determine a time (in years) when the price will be halved.
• Compound interest Calculate time when deposit in the bank with interest 2.5% p.a. doubles.
• Coordinate Determine missing coordinate of the point M [x, 120] of the graph of the function f bv rule: y = 5x
• An investment How long will it take for an investment to double at a simple interest rate of 5.10% p. A. ? Express the answer in years and months, rounded up to the next month.
• Sum-log The sum of two numbers is 32, the sum of their logarithms (base 10) is 2.2. Determine these numbers.

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