# Equation + exponential equation - math problems

#### Number of problems found: 54

• Exponential equation In the set R solve the equation: ?
• Exponential equation Solve exponential equation (in real numbers): 98x-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.
• Exponential equation Determine the value of having y in the expression (3^y): (4^-1)=36. Unknown y is a natural number greater than zero.
• Log if ?, what is b?
• One third power Which equation justifies why ten to the one-third power equals the cube root of ten?
• Exp If ?, then n is:
• Sequence Calculate what member of the sequence specified by ? has value 86.
• Interest What is the annual interest rate on your account if we put 32790 and after 176 days received 33939.2?
• Coordinate Determine missing coordinate of the point M [x, 120] of the graph of the function f bv rule: y = 5x
• 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 a4 = 20 a9 = -160. Calculate the first member a1 and quotient q. A radioactive material loses 10% of its mass each year. What proportion will be left there after n=6 years? 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?

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