# Check Answers (Please Help!)

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Thread starter 1 month ago
#1
Can someone please check their answers with me for these questions.
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1 month ago
#2
(Original post by Unknown1234abcd)
Can someone please check their answers with me for these questions.
Er, where's your working?
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Thread starter 1 month ago
#3
(Original post by davros)
Er, where's your working?
I will send it later.
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1 month ago
#4
If you send it after we say the answers you can just cheat and pretend you did it already. TSR does not encourage us to do your homework/exam for you.
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Thread starter 1 month ago
#5
For the prism question, I got 1240000mm^3 and for the force question I got (0.07,0.24).
For the prism question I worked out the angle cab to get 125 degrees and then worked out ac by doing the sine rule. I got 20.64mm and I then worked out the area of the prism to get 206.4mm^2.Then I looked up the formula for the volume which was v=0.5*b*a*h.I got 1240000mm^3.For the forces question, I said F=t(7,24),then I worked out the modulus of the f which was 25t.Then, using suvat I got 2.5 for the acceleration and then I worked out t which was 0.01.
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1 month ago
#6
(Original post by Unknown1234abcd)
For the prism question, I got 1240000mm^3 and for the force question I got (0.07,0.24).
For the prism question I worked out the angle cab to get 125 degrees and then worked out ac by doing the sine rule. I got 20.64mm and I then worked out the area of the prism to get 206.4mm^2.Then I looked up the formula for the volume which was v=0.5*b*a*h.I got 1240000mm^3.For the forces question, I said F=t(7,24),then I worked out the modulus of the f which was 25t.Then, using suvat I got 2.5 for the acceleration and then I worked out t which was 0.01.
Check what you're working out here! I agree with your area, but for a prism of constant cross-section the volume is just length x cross-sectional area.

Your force multiplier looks OK but I was confused at first because t almost always means time in a SUVAT problem - I would have used k or something for a constant multiplier to avoid confusion in future
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Thread starter 1 month ago
#7
(Original post by davros)
Check what you're working out here! I agree with your area, but for a prism of constant cross-section the volume is just length x cross-sectional area.

Your force multiplier looks OK but I was confused at first because t almost always means time in a SUVAT problem - I would have used k or something for a constant multiplier to avoid confusion in future
OK, thanks for the feedback.Is my Force answer correct or not?
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Thread starter 1 month ago
#8
For 4,i did log10(x^4/100 times 9x all/x^3).Then I got log10(9x^2/100).And I got as far as 2log10(9x-100),but I am confused as too how to get to the final answer from there. For the expo and disguised Quadratics question, i don't know how to start them.
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1 month ago
#9
(Original post by Unknown1234abcd)
For 4,i did log10(x^4/100 times 9x all/x^3).Then I got log10(9x^2/100).And I got as far as 2log10(9x-100),but I am confused as too how to get to the final answer from there. For the expo and disguised Quadratics question, i don't know how to start them.
For the log question, jjust use the normal log rules. You must have a list/table of them in your notes. It would help to see an image of your working and reasons why you did things rather than "I did", "I got", "I am confused" as that gives us little idea about what you're trying to do and why, and why you're stuck.

Why not start by writing down the "quadratic" expression and use the described substitution for the disguised quadraic.

Describe what you think about the exponential expression? As a hint, you could use a geometric sequence you learnt at gcse as a geometric sequence is equivalent to a discretely, sampled exponential

If youre unable to start them, just hand in your work without them.
Last edited by mqb2766; 1 month ago
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