exam Maths Puzzle Numerical Ability

I have two problems I need assistance with. I just need to know how to solve the questions.

1. if y=e with an exponant of 4 then In y= ?

2. find the rate of change of y, when y=30 + 4x, over the interal x=2 to x=4?

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exam Other Question

tutor could you help me please?

If x=3 and y=2, then 4x+3y/x-y =??

Thank you verymuch for your help!!!
(1/16)^-3/4