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biology calculation question
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alevels2k17
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#1
can someone pls explain to me how this calculation question is done?
heres the markscheme
1. one correct calculation eg (1.5 ÷ 1.4) = { 1.07 / 1.1 } x bigger (1.5 ÷ 1.7) = { 0.88 / 0.9 } x bigger (1.8 ÷ 1.4) = { 1.29 / 1.3 } x bigger (1.8 ÷ 1.7) = { 1.06 / 1.1 } x bigger
2. between { 1.06 and 1.29 / 1.1 and 1.3 } x bigger ;
heres the markscheme
1. one correct calculation eg (1.5 ÷ 1.4) = { 1.07 / 1.1 } x bigger (1.5 ÷ 1.7) = { 0.88 / 0.9 } x bigger (1.8 ÷ 1.4) = { 1.29 / 1.3 } x bigger (1.8 ÷ 1.7) = { 1.06 / 1.1 } x bigger
2. between { 1.06 and 1.29 / 1.1 and 1.3 } x bigger ;
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hazybubbles
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#2
The mark scheme is saying any of those calculations will do to get you the first mark.
You need to divide either of the numbers from the white rhino by either of the numbers from the black rhino.
As long as the answer you get fits the calculation you have performed you get the mark.
However to get the full 2 marks you need to state a range from the smallest number of times bigger to the largest.
You find this by dividing the smallest white rhino number by the smallest black rhino number for the lower end of the range, and then the largest white rhino number by the smallest black rhino number for the upper end of the range.
You need to divide either of the numbers from the white rhino by either of the numbers from the black rhino.
As long as the answer you get fits the calculation you have performed you get the mark.
However to get the full 2 marks you need to state a range from the smallest number of times bigger to the largest.
You find this by dividing the smallest white rhino number by the smallest black rhino number for the lower end of the range, and then the largest white rhino number by the smallest black rhino number for the upper end of the range.
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