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AQA Core 4 MPC4 -- 16th June 2011

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However, I think the question asked in what year would the the pay exceed 100000 on the 1st of August and in 2015 the pay is not exceeded by the 1st August. it is only exceeded by the 1st August in 2016.
I think it was a bit of a trick question.

However, even if you add on the 0.4 of a year it still exceeds 100000 within the year 2015 as August is only the 7th month of the year

Reply 81

harky 1

K=3, A=4, B=2, C=1, Pi/4, P=3, Q=2, t=2015, A=K^t.................................. Did anyone get any of these?

Reply 82

QueenVic92

Original post by j04millj

However, even if you add on the 0.4 of a year it still exceeds 100000 within the year 2015 as August is only the 7th month of the year

No, because the year started on the 1st of August, so that's what the value would have been on that day.

Reply 83

Cameronn

I need 43/100 for an A, but I've totally screwed up the exam!! Don't even think I'll get an E in it, what do people think the raw marks for 43/100 would be!? :frown:

Reply 84

mooser1

2016 I got,it was worded really stupidly but I'm pretty sure that's right.
A=-kt as it was decay.
What about that munter of a question,
2y + (e^2x)y^2 = x^2 + C
What did people get for C? I got 2/e

Reply 85

Gen-10

Original post by j04millj

However, even if you add on the 0.4 of a year it still exceeds 100000 within the year 2015 as August is only the 7th month of the year

But you were starting it from 1st august 1960, so it works out that 55.33 goes to like december 2015 which means it'll exceed 100'000 on the 1st August 2016 for the first time!

Reply 86

Shaaaady

Original post by harky 1

K=3, A=4, B=2, C=1, Pi/4, P=3, Q=2, t=2015, A=K^t.................................. Did anyone get any of these?

I think the integral of sin^2(x) from (-pi/4) to (pi/4) was pi/4 - 1/2

Reply 87

j04millj

Original post by QueenVic92

No, because the year started on the 1st of August, so that's what the value would have been on that day.

Yes, because it would first exceed 100000 0.4 years after 1st August 2015. This puts it in December 2015, doesn't it? So the year it first exceeds 100000 is surely still 2015?

Reply 88

harky 1

Original post by Shaaaady

I think the integral of sin^2(x) from (-pi/4) to (pi/4) was pi/4 - 1/2

How was that because the 1/8 canceled and left with (1/8 pi)-(-1/8 pi) ====> 1/4 pi

Reply 89

Brister

Original post by harky 1

K=3, A=4, B=2, C=1, Pi/4, P=3, Q=2, t=2015, A=K^t.................................. Did anyone get any of these?

A = -kt + c, because the surface area had a constant rate of change with respect to time such that dA/dt = -k
A = 4 (for the partial fractions question)
B = -2
C =1
P = (1/2)
Q = 2
t = 2015

Reply 90

mooser1

Original post by j04millj

Yes, because it would first exceed 100000 0.4 years after 1st August 2015. This puts it in December 2015, doesn't it? So the year it first exceeds 100000 is surely still 2015?

It said in which year, on the 1st august will it first exceed
2016

Reply 91

QueenVic92

Original post by j04millj

Yes, because it would first exceed 100000 0.4 years after 1st August 2015. This puts it in December 2015, doesn't it? So the year it first exceeds 100000 is surely still 2015?

I think the question said what year, on the 1st of August, does it exceed 100000, so that would make it 2016, because the value was around 55.4 in August 2015.

Reply 92

harky 1

Original post by Brister

A = -kt + c, because the surface area had a constant rate of change with respect to time such that dA/dt = -k
A = 4 (for the partial fractions question)
B = -2
C =1
P = (1/2)
Q = 2
t = 2015

Messed that up then =( u think the grade boundries will get lowered?

Reply 93

j04millj

Original post by QueenVic92

I think the question said what year, on the 1st of August, does it exceed 100000, so that would make it 2016, because the value was around 55.4 in August 2015.

I thought it said which year rather than which 1st of August. Can anyone confirm the wording of the question?

Reply 94

katierose93

Original post by harky 1

How was that because the 1/8 canceled and left with (1/8 pi)-(-1/8 pi) ====> 1/4 pi

I definitely got pi/4 - 1/2 too

Reply 95

jbchichoko

Original post by justmikeinit

it asked in which year the value would first exceed 100,000. which would make it 2015

exactly!!

Reply 96

Wisham

Original post by harky 1

How was that because the 1/8 canceled and left with (1/8 pi)-(-1/8 pi) ====> 1/4 pi

I got it what (1/8pi -1/4) - (-1/8pi +1/4)

Which would give 1/4pi -1/2

not sure though because i had to do it in 5 mintues at the end because I accidently skipped it >.>

Reply 97

Hot Stuff_007

For the parametric equations question where you had to find the eqn of the normal, would you still get the marks if you did it in degrees rather than radians? I got decimals in my answer