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# Help with S2 question? watch

1. How do you do 12b?

Thank you

Edit: Sorry!!! It was the wrong photo

Edit 2: Why is it sideways? It wasn't like that on the document folder ((

Q 12A) Ans= median is ln2/a

12) fx= ae^(-ax) x>0

The above distribution, with a=0.8, is proposed as a model for the length of life, in years, of a species of bird.
Find the expected number out of a total of 50 birds that would fall in the class interval of 2-3 years
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2. this is c3?
3. (Original post by RegrettingAS)
this is c3?
yep xD
4. (Original post by Jellyxx)

How do you do 10b?

Thank you
If f(x) = 4, f(x)^2 = 16...
5. [QUOTE=Jellyxx;69444488]
How do you do 12b?

Thank you

Edit: Sorry!!! It was the wrong photo

Edit 2: Why is it sideways? It wasn't like that on the document folder ((

Q 12A) Ans= median is ln2/a

12B) fx= ae^(-ax) x>0

The above distribution, with a=0.8, is proposed as a model for the length of life, in years, of a species of bird.
Find the expected number out of a total of 50 birds that would fall in the class interval of 2-3 years.

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