John is given a 5% pay rise, while Michael is given a 25% pay rise. The ratio between Michael and John is now 12:7. John has a salary of £21 000 after the rise. Find Michael's salary before the rise. This question was given in the 2021 End of Year 8 Assessment in England.

answer is 33

step-by-step explanation:

e^-kt = n/n0 = 0.79  

-kt = ln 0.79  

t = - ln 0.79/0.0001  

= 2357 years

step-by-step explanation:

the functions have the same rate of change i think. i narrowed it down to this answer and "the rate of change of tour 1 is greater" but i got it wrong using that answer so im assuming its the answer above. (this is a question i also answered from the iready site if anyone needs a reference)