Questions 21 b) and 28 a) don't seem correctSomeone 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.
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)??Questions 21 b) and 28 a) don't seem correct
Yes exactly, that's what I didYeah 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)??
This one seems wrong as well - isn't the derivative incorrect?Was question 21 b) instantaneous rate of change?
Wouldn't derivative be -28(1.5)^-0.4tThis one seems wrong as well - isn't the derivative incorrect?
nah i think you can only do that if it's eWouldn't derivative be -28(1.5)^-0.4t
I got -28ln1.5*(1.5)^-0.4tWouldn't derivative be -28(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 correctI got -28ln1.5*(1.5)^-0.4t
Yes i got the same result aswellI got -28ln1.5*(1.5)^-0.4t
Yeah i got c = e as well and a few of my mates did tooalso for 29 b I got c=e but not sure if that is correct