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4*5^(-6t)=2000
Which of the following is the solution of the equation?
Choose 1 answer:
(A) 
t=(-log_(5)(500))/(6)
(B) 
t=(-log_(20)(2000))/(6)
(c) 
t=(-log_(2000)(20))/(6)
(D) 
t=(-log_(500)(5))/(6)

456t=2000 4 \cdot 5^{-6 t}=2000 \newlineWhich of the following is the solution of the equation?\newlineChoose 11 answer:\newline(A) t=log5(500)6 t=\frac{-\log _{5}(500)}{6} \newline(B) t=log20(2000)6 t=\frac{-\log _{20}(2000)}{6} \newline(C) t=log2000(20)6 t=\frac{-\log _{2000}(20)}{6} \newline(D) t=log500(5)6 t=\frac{-\log _{500}(5)}{6}

Full solution

Q. 456t=2000 4 \cdot 5^{-6 t}=2000 \newlineWhich of the following is the solution of the equation?\newlineChoose 11 answer:\newline(A) t=log5(500)6 t=\frac{-\log _{5}(500)}{6} \newline(B) t=log20(2000)6 t=\frac{-\log _{20}(2000)}{6} \newline(C) t=log2000(20)6 t=\frac{-\log _{2000}(20)}{6} \newline(D) t=log500(5)6 t=\frac{-\log _{500}(5)}{6}
  1. Divide and isolate variable term: Divide both sides of the equation by 44 to isolate the term with the variable t.\newlineCalculation: 456t4=20004 \frac{4 \cdot 5^{-6t}}{4} = \frac{2000}{4} \newline56t=500 5^{-6t} = 500
  2. Apply logarithm to both sides: Apply the logarithm to both sides of the equation to solve for t.\newlineCalculation: log(56t)=log(500) \log(5^{-6t}) = \log(500)
  3. Use logarithm property: Use the property of logarithms that allows us to bring the exponent in front of the logarithm.\newlineCalculation: 6tlog(5)=log(500) -6t \cdot \log(5) = \log(500)
  4. Divide by 6-6log(55): Divide both sides of the equation by 6log(5)-6 \log(5) to solve for t.\newlineCalculation: t=log(500)6log(5) t = \frac{\log(500)}{-6 \log(5)}
  5. Correct previous error: Recognize that log(500)\log(500) can be simplified to log(53)\log(5^3) since 500=53500 = 5^3.\newlineCalculation: t=log(53)6log(5) t = \frac{\log(5^3)}{-6 \log(5)}
  6. Correct previous error: Recognize that log(500)\log(500) can be simplified to log(53)\log(5^3) since 500=53500 = 5^3.\newlineCalculation: t=log(53)6log(5) t = \frac{\log(5^3)}{-6 \log(5)} Apply the property of logarithms that allows us to bring the exponent out in front of the logarithm.\newlineCalculation: t=3log(5)6log(5) t = \frac{3 \log(5)}{-6 \log(5)}
  7. Correct previous error: Recognize that log(500)\log(500) can be simplified to log(53)\log(5^3) since 500=53500 = 5^3.\newlineCalculation: t=log(53)6log(5) t = \frac{\log(5^3)}{-6 \log(5)} Apply the property of logarithms that allows us to bring the exponent out in front of the logarithm.\newlineCalculation: t=3log(5)6log(5) t = \frac{3 \log(5)}{-6 \log(5)} Simplify the expression by canceling out log(5)\log(5) on the numerator and the denominator.\newlineCalculation: t=36 t = \frac{3}{-6}
  8. Correct previous error: Recognize that log(500)\log(500) can be simplified to log(53)\log(5^3) since 500=53500 = 5^3.\newlineCalculation: t=log(53)6log(5) t = \frac{\log(5^3)}{-6 \log(5)} Apply the property of logarithms that allows us to bring the exponent out in front of the logarithm.\newlineCalculation: t=3log(5)6log(5) t = \frac{3 \log(5)}{-6 \log(5)} Simplify the expression by canceling out log(5)\log(5) on the numerator and the denominator.\newlineCalculation: t=36 t = \frac{3}{-6} Simplify the fraction to find the value of t.\newlineCalculation: t=12 t = -\frac{1}{2}
  9. Correct previous error: Recognize that log(500)\log(500) can be simplified to log(53)\log(5^3) since 500=53500 = 5^3.\newlineCalculation: t=log(53)6log(5) t = \frac{\log(5^3)}{-6 \log(5)} Apply the property of logarithms that allows us to bring the exponent out in front of the logarithm.\newlineCalculation: t=3log(5)6log(5) t = \frac{3 \log(5)}{-6 \log(5)} Simplify the expression by canceling out log(5)\log(5) on the numerator and the denominator.\newlineCalculation: t=36 t = \frac{3}{-6} Simplify the fraction to find the value of t.\newlineCalculation: t=12 t = -\frac{1}{2} Realize that a mistake was made in the previous steps because the simplification of log(500)\log(500) to log(53)\log(5^3) was incorrect since log(53)\log(5^3)00 is not equal to log(53)\log(5^3)11. Therefore, we need to correct the error and go back to Step 44.

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