http://www.boardofstudies.nsw.edu.au/hsc_exams/hsc2008exams/pdf_doc/2008HSC-general-mathematics.pdf Question 19 of multi choice. I dont understand how to get the answer of B I can work it out through trial and error going through the possible answers.. but its not eh correct way. can someone help me???
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Proportional to sqrt ?? (1 Viewer)
- Thread starter Nivek5
- Start date
h is proportional to √n
.: h = k x √n , where k is the constant of proportionality
When h = 35, n = 2000
.: 35 = k x √2000
k = 35/√2000
So put this in our formula.
h = 35/√2000 x √n
Now, when n = 10000:
h = 35/√2000 x √10000
= 78.26237921
= 78 cm
.: h = k x √n , where k is the constant of proportionality
When h = 35, n = 2000
.: 35 = k x √2000
k = 35/√2000
So put this in our formula.
h = 35/√2000 x √n
Now, when n = 10000:
h = 35/√2000 x √10000
= 78.26237921
= 78 cm
