AQA A level Biology Logs/Percentages question

I'm doing an exam paper and it consists on a graph with Log10 number of cells in tumour on the y axis, and time on the x axis. It has a line at y= 9 which is where the tumour can be detected and the question asks to calculate the PERCENTAGE of maximum growth this type of tumour reaches before it can be detected. How would I do this?

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Reply 1

Renn0

12

The curve plateaus at 12 on the y axis. This means that the maximum growth this tumour can reach is 12. Because the minimum size in which it can be detected is 9, I'm thinking it's just (9/12)x100, which is 75%.

Reply 2

teddyrocks22

3

Original post by mushed

I'm doing an exam paper and it consists on a graph with Log10 number of cells in tumour on the y axis, and time on the x axis. It has a line at y= 9 which is where the tumour can be detected and the question asks to calculate the PERCENTAGE of maximum growth this type of tumour reaches before it can be detected. How would I do this?

Hey, this might be a long shot, but did you ever find the answer to this question? I had it in my biology exam earlier today and I don’t know if I did it right?! (Which I probably didn’t haha)
Thanks!

Reply 3

mushed

OP

11

Original post by teddyrocks22

Hey, this might be a long shot, but did you ever find the answer to this question? I had it in my biology exam earlier today and I don’t know if I did it right?! (Which I probably didn’t haha)
Thanks!

Hi! I'm so sorry I don't have my exam papers anymore so I can't remember! I'm sure you've done great still haha and one question won't make too much of a difference, as long as you attempted it you'll probably pick up marks :smile:

Reply 4

teddyrocks22

3

Original post by mushed

Hi! I'm so sorry I don't have my exam papers anymore so I can't remember! I'm sure you've done great still haha and one question won't make too much of a difference, as long as you attempted it you'll probably pick up marks :smile:

No worries, thank you!