The second one, because the price of the candle is $4, meaning the equation would have to be 4x+3=19
Number 3 is your answer.
Hope this helps! Good luck! :)
<u>Answer-</u>
is the correct answer.
<u>Solution-</u>
The formula for change of base in logarithm is given by,

If we take the common base as 'e' , the formula becomes,

Applying this formula,

∴ As the first option matches with our answer, hence it is the correct answer.
( In the fourth option a bracket is missing, so it is not the correct option)