Question

Logarithms question, please refer to image. Desperately need help!

Answer 1

The first one if fairly easy. I am sure you can do that.

Answer 2

Yes I know the first part

Answer 3

For the second part you can keep substituting for t until it exceeds 8000 or you can use logs if you really wanted.

Answer 4

Is it the last part that you are struggling on?

Answer 5

yup

Answer 6

As in I need help with the last part

Answer 7

Alright. Do you know that we can log both sides right?

Answer 8

Wait, I cannot get the correct answer for the 2nd part, could you also help with that?

Answer 9

Well you realize we need to set up an equality right?

Answer 10

What is your equality?

Answer 11

yes

Answer 12

I'm stuck after I get lg(5/8) = t lg(1.04)

Answer 13

Should be 8/5 not 5/8 .

Answer 14

8000=5000(1.04)^t

8/5=1.04^t

Answer 15

oh okay

Answer 16

But how to continue after that? I still don't understand

Answer 17

So you have: