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# Maths year 11 Watch

1. (Original post by 34908seikj)
Here

Thank you will focus now )

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2. (Original post by z_o_e)
Thank you will focus now )

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Just make sure with bearings, if you answer is only two numbers like say 50 degrees, you need to add a 0 at the front so it's three numbers - 050 degrees, for example.
3. (Original post by 34908seikj)
It's essentially the opposite of compound interest; instead of increasing in value, it decreases.

To calculate compound interest we do, for example 1000*1.1^2 - This will give us the value after 2 years at a rate of 10% compound interest

Now for deprecation we would do 1000*0.9^2 - This will give us the value after 2 years at a rate of deprecation at 10%. (It goes down by 10% of the current value per year)

Just remember with deprecation the decimal must be lower than 1.
Hayaa
Just did this question..
The question was something like £800 depreciates by 30% in 2 years.

So I did this

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4. (Original post by z_o_e)
Hayaa
Just did this question..
The question was something like £800 depreciates by 30% in 2 years.

So I did this

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Close, you got the percentage the wrong way around when you took it away.

5. (Original post by 34908seikj)
Close, you got the percentage the wrong way around when you took it away.

second question
I feel Confident now!

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6. (Original post by z_o_e)
second question
I feel Confident now!

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Yup, you got it!
7. (Original post by 34908seikj)
Yup, you got it!
Yaaay now onto bearings

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8. (Original post by 34908seikj)
Yup, you got it!
Bearing of a from B
Is this 180-72

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9. (Original post by z_o_e)
Is this 180-72

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What was the question?
10. (Original post by 34908seikj)
What was the question?
Bearing of A From b

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11. You always go clockwise and if it's A to B, it will just be 072, or have you wrote the diagram out correctly?
12. (Original post by z_o_e)
Bearing of A From b

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13. (Original post by 34908seikj)

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14. Yes, there's two ways of working it out, 360 - the co-interrior angle or the alternate angle + 180
15. (Original post by 34908seikj)
Yes, there's two ways of working it out, 360 - the co-interrior angle or the alternate angle + 180
So the answer is 252 degrees? Or 108? :/ I think it's 252

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16. (Original post by z_o_e)
So the answer is 252 degrees? Or 108? :/ I think it's 252

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Yes, sorry it's 252 degrees
17. (Original post by 34908seikj)
Yes, sorry it's 252 degrees
Any hints on how to do the 3rd one?

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18. (Original post by z_o_e)
Any hints on how to do the 3rd one?

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What's the question? A to B?

Ah, its B to A obviously.

19. (Original post by 34908seikj)
What's the question? A to B?

Ah, its B to A obviously.

Question is the same ... bearing of A FROM B

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20. (Original post by 34908seikj)
What's the question? A to B?

Ah, its B to A obviously.

Got something like this

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