A Level Edexcel Maths 2021 Exam Assessment Material Unofficial Markscheme

It should be 0.035. The value of c is 1/12 or 0.0833...

Wrote the answer neatly this time ahah, if you get two notifications from me it’s because i deleted the first one. Answer is 0.035

Here you go, just done it...

hi, this all made sense but can you explain how you did the integration in part b? i ended up with just -1/4, so i’m not sure where i went wrong 🥲

sorry i only just checked this now yes i have gone through it

For 9MA0 iteration topic 9 the first question (ii) it says to find the x coordinate of P however What does it mean by this what P?

how did you cancel both of the e functions on the denominator? the numerator is two separate values so even if they both have the e function as a factor, shouldn’t it only cancel the square of the e function?? i’m so confused,,

also sorry if you get this message twice i’m not sure if sure if it went through the first time

Very sorry for the late reply. I'm not saying I know for sure, but I thought you could cancel the first bracket of e in the denominator with the first e in the numerator. Then you are left with another e in the denominator and it cancels with the e on the end of the numerator. Hope that makes sense but that's the 'logic' I used but that might well be wrong

Hey! Has anyone done question 7 of the Topic 8 integration (the one about the balloon deflating)? I got part a, but my answer to part b is..
r^3 = 2240t^2 + 64000
Did anyone else get this?

Sorry – I haven't done part b, cause I'm stuck on part a. How did you do it?

V= 4/3(pi)r^3 (volume of a sphere)
dV/dr = 4(pi)r^2
dV/dt = -k (got from the question where they say volume is decreasing at a constant rate)
dr/dt = dr/dV * dV/dt
= 1/4(pi)r^2 * -k
=-k/r^2
1/4(pi) is written as part of the constant
hope this makes sense!!

Does anyone know how to do Q5 i b of applied maths edexcel 9MA0 topic 3 probability?

Sorry about how messy it is, but i think it should be something like this?? (I might be wrong though ahah) We don’t have any information on what P(B) actually is so I think you should only fill in the venn in terms of P(B). For part b, the overall probability can’t be more than 1.00, so the maximum value of P(B) should be 0.25 (because 1-(4x0.25) is 0).

Has anyone done questions 4 and 5 on moment resource set 1 topic 9 9MA0??