SOLUTION: Use the change of base formula to convert log5(like an exponent on the bottom)and (3x)^4 to base e. Then evaluate when x=7. I worked it out to: =4(ln3+ln7/ln) I know I'm suppose

Algebra ->  Logarithm Solvers, Trainers and Word Problems -> SOLUTION: Use the change of base formula to convert log5(like an exponent on the bottom)and (3x)^4 to base e. Then evaluate when x=7. I worked it out to: =4(ln3+ln7/ln) I know I'm suppose      Log On


   

Question 189598This question is from textbook saxon algebra 2
: Use the change of base formula to convert log5(like an exponent on the bottom)and (3x)^4 to base e. Then evaluate when x=7.
I worked it out to: =4(ln3+ln7/ln)
I know I'm supposed to enter this into the calculator, but I know I'm not coming out with the right answer. This question is from textbook saxon algebra 2

Answer by nerdybill(7384) About Me  (Show Source):
You can put this solution on YOUR website!
log5+%28%283x%29%5E4%29
ln%283x%29%5E4%2Fln%285%29%29
ln%28%283x%29%5E4+-+5%29%29
.
Now, if x = 7
ln%28%2821%29%5E4+-+5%29%29
ln%28%2821%29%5E4+-+5%29%29
12.1781