Math Problem Statement

What is the solution to the equation 4(10)^{8t} = 2?

Solution

The given equation is 4(10)8t=24(10)^{8t} = 2.

We need to solve for tt.

Step 1: Isolate the exponential term

Divide both sides of the equation by 4: (10)8t=24=12(10)^{8t} = \frac{2}{4} = \frac{1}{2}

Step 2: Take the logarithm of both sides

We can apply the logarithm (log base 10 or natural log, typically doesn't matter which) to both sides to get: log((10)8t)=log(12)\log((10)^{8t}) = \log\left(\frac{1}{2}\right)

Using the logarithmic identity log(ab)=blog(a)\log(a^b) = b \log(a), we get: 8tlog(10)=log(12)8t \log(10) = \log\left(\frac{1}{2}\right)

Since log(10)=1\log(10) = 1, the equation simplifies to: 8t=log(12)8t = \log\left(\frac{1}{2}\right)

Step 3: Solve for tt

t=18log(12)t = \frac{1}{8} \log\left(\frac{1}{2}\right)

Since log(12)=log(2)\log\left(\frac{1}{2}\right) = -\log(2), we have: t=18(log(2))=log(2)8t = \frac{1}{8} (-\log(2)) = -\frac{\log(2)}{8}

Thus, the solution to the equation is: t=log(2)8t = -\frac{\log(2)}{8}

In the context of the answer choices provided: The first option 18log(12)\frac{1}{8} \log\left(\frac{1}{2}\right) is correct.

Would you like further details on logarithmic properties or solving exponential equations?

Here are 5 follow-up questions related to this topic:

  1. What is the significance of logarithms in solving exponential equations?
  2. How do logarithmic identities simplify solving exponential functions?
  3. What happens if we use natural logarithms instead of base-10 logarithms in this problem?
  4. Why does the equation log(10)=1\log(10) = 1 hold true?
  5. How would this solution change if the equation were 4(10)8t=84(10)^{8t} = 8?

Tip: Whenever solving for an exponent, using logarithms is key to isolating the variable efficiently.

Ask a new question for Free

By Image

Drop file here or Click Here to upload

Math Problem Analysis

Mathematical Concepts

Exponential Equations
Logarithms
Algebra

Formulas

log(a^b) = b * log(a)
log(10) = 1

Theorems

Logarithmic Identities
Properties of Exponents

Suitable Grade Level

Grade 8-10