#### tatina

##### New Member
Does anyone have a copy of the 2020 Advanced Maths paper, now that it is done? Thanks in advance.

##### New Member
Someone posted it (with answers) in the advanced maths thoughts thread. I'm not sure of the accuracy of the answers though. I hope this helps.

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#### Kangaaroo

##### Member
Someone posted it (with answers) in the advanced maths thoughts thread. I'm not sure of the accuracy of the answers though. I hope this helps.
Questions 21 b) and 28 a) don't seem correct

#### mmmm.

##### Active Member
Questions 21 b) and 28 a) don't seem correct
Yeah i didn't think they were right, for 28 a) It says at least one of the 2 are paid within the range, so wouldn't it be 1-(none paid in the range)??

#### Kangaaroo

##### Member
Yeah i didn't think they were right, for 28 a) It says at least one of the 2 are paid within the range, so wouldn't it be 1-(none paid in the range)??
Yes exactly, that's what I did

##### New Member
Was question 21 b) instantaneous rate of change?

#### Kangaaroo

##### Member
Was question 21 b) instantaneous rate of change?
This one seems wrong as well - isn't the derivative incorrect?

#### Althacommie

##### New Member
Is 29 b) correct? Because in the exam i got the value for c as just e

#### mmmm.

##### Active Member
This one seems wrong as well - isn't the derivative incorrect?
Wouldn't derivative be -28(1.5)^-0.4t

#### demonicblackcat

##### Member
Wouldn't derivative be -28(1.5)^-0.4t
nah i think you can only do that if it's e

#### Althacommie

##### New Member
I got -28ln1.5*(1.5)^-0.4t
I got that too... the formula for the derivative of a^x is on the formula sheet so I'm pretty sure thats correct

#### ItzZoni

##### Member
also for 29 b I got c=e but not sure if that is correct

#### Althacommie

##### New Member
also for 29 b I got c=e but not sure if that is correct
Yeah i got c = e as well and a few of my mates did too

#### AuroraXT

##### New Member
For question 28a) I did 1- (1-0.815)^2 = 0.965775
Also got e for 29b)
For question 21b) I did 70 x -0.4 x ln1.5 x 1.5^(0.4 x 4) = -5.93