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# Logs and Trig Exam Question Help

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1. Been doing loads of past papers for my C2 exam next week, and both of these questions I got parts of the question wrong.

For the first one I got:

And I factorised using the quadratic formula to get:

But this is wrong...

For the second one I got n=2.71 through the use of simultaneous equations. I then substituted in n to find a value for a. I got 8.99 which is way out of the mark scheme's tolerance.

Any help will be appreciated. I can post exactly what I did if it will help, just let me know.

Thanks,
Sora
2. (Original post by Sora)
Been doing loads of past papers for my C2 exam next week, and both of these questions I got parts of the question wrong.

For the first one I got:

And I factorised using the quadratic formula to get:

But this is wrong...

For the second one I got n=2.71 through the use of simultaneous equations. I then substituted in n to find a value for a. I got 8.99 which is way out of the mark scheme's tolerance.

Any help will be appreciated. I can post exactly what I did if it will help, just let me know.

Thanks,
Sora
Why the hell did you used the quadratic formula?

Now solve it.
3. I can't read my own writing xD Thank you!

Any help on the logs?
4. (Original post by Sora)
I can't read my own writing xD Thank you!

Any help on the logs?

Sub in (2,6),

Sub in (3,18),

Now divide (2) by (1), and then use logs.
5. Both of these were silly mistakes on my part -.- Thank you

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