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Mathematics: Post your doubts here!

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Question:

The number of fish on a farmincreases by approximately 10% each month. If there were originally 350 fish, calculate to the nearest 100 how many fish would there be after 12 months ?
(Question from IGCSE Mathematics by Hodder Education 3rd Edition)

Guys I got an answer with round off of 800 but in the answers it has 1100 please tell me why is it 1100.

My solution:
so after my calculation each month 35 fish increase so the number of fish were originally 350 so
35 x 12 = 420 + 350= 770

Thanks

Any answers I have'nt got my answer.
 
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it is actually, each month it increases by 10% of the previous month, not 10% of 350.

that makes...
[(110/100) ^12] *350
 
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Hello. I need help understanding May June 2010 q-41 question 7 c i) and ii)
Thanks in advance.
Link:
http://papers.xtremepapers.com/CIE/Cambridge IGCSE/Mathematics (0580)/0580_s10_qp_41.pdf
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Hello. I need help understanding May June 2010 q-41 question 7 c i) and ii)
Thanks in advance.
Link:
http://papers.xtremepapers.com/CIE/Cambridge IGCSE/Mathematics (0580)/0580_s10_qp_41.pdf

i) see, the triangle is an isosceles triangle so all its angles measure 60.
angles between tangents and radii are always 90.
so ECD + 90 + 90 + 60 = 360
ii)
its simple that arc length = (angle of the arc/360) * 2 * pi * r
so, DE = 120/360 * 2 * pi * 31
hope you got it :)
 
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View attachment 38081


i) see, the triangle is an isosceles triangle so all its angles measure 60.
angles between tangents and radii are always 90.
so ECD + 90 + 90 + 60 = 360
ii)
its simple that arc length = (angle of the arc/360) * 2 * pi * r
so, DE = 120/360 * 2 * pi * 31
hope you got it :)
An isosceles triangle does not have all of its angles equal to 60. That is an equilateral triangle
 
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View attachment 38081


i) see, the triangle is an isosceles triangle so all its angles measure 60.
angles between tangents and radii are always 90.
so ECD + 90 + 90 + 60 = 360
ii)
its simple that arc length = (angle of the arc/360) * 2 * pi * r
so, DE = 120/360 * 2 * pi * 31
hope you got it :)
i) There is another way to solve it ; a much easier way
A circle property was that (in this case)
ECD + 60 =180
ECD = 120
 
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after trying alot cant do it! PLEASE any one help me with this?

only the (e) part.

i gueess theres any formula also?

actual map dist/map distance * (scale)^2
 

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after trying alot cant do it! PLEASE any one help me with this?

only the (e) part.

i gueess theres any formula also?

actual map dist/map distance * (scale)^2
its really simple, no squaring and stuff.
just, 4.5/HP = 1/n

temme if u really get your answer :)
 
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