PLEASE HELP!!!

Solve 4^x = 12

a.) x ≈ 0.27
b.) x ≈ 0.56
c.) x ≈ 1.79
d.) x ≈ 19.93

Question

PLEASE HELP!!!

Solve 4^x = 12

a.) x ≈ 0.27
b.) x ≈ 0.56
c.) x ≈ 1.79
d.) x ≈ 19.93

mathstudent55 · Answer

None of the answers are correct.

anonymous · Answer

i copied and pasted the question and answers directly form the site.

anonymous · Answer

sry but these are all not it

mathstudent55 · Answer

That's better.

mathstudent55 · Answer

$4^x = 12$
Take log of both sides:
$\log{4^x} = \log{12}$
Use law of logs:
$x \log {4} = \log{12} $
Solve for x

mathstudent55 · Answer

One of the answers is correct.

anonymous · Answer

Ah yes! I must have missed the power sign!
[problem with computers and maths!]

Yes, one of the answers is correct!

mathstudent55 · Answer

@sarahusher You didn't miss the power sign. It was added later.

anonymous · Answer

$$b^x=A\iff x=\frac{\ln(A)}{\ln(b)}$$ and a calculator

anonymous · Answer

anonymous · Answer

looks to be about 1.79...