If $22400 dollars is invested at an interest rate of 6 percent per year, find the value of the inves

one of the toughest weeks and my "professor" decided not teach the section!!
Instead directing us towards Khan!!!  

I was able to get most of it, but these last few are giving me a hard time

 If $22400 dollars is invested at an interest rate of 6 percent per year, find the value of the investment at the end of 5 years

Daily: 33415.5
compound?

Continuously: I got 33416.87                but they are both wrong
compound?  


second part

Find a possible formula for this function?

x =   0   1   2   3   4
y =   5   35   245   1715   12005

why does 240x-235 not work?


part 3

Your supposed to write (16e^6x)^-1/2 in ae^b form
I got a which is 1/4
but for b why isn't it 3 or 3x?



The last one-  For which values of x is the function f(x) negative?
(inequality form)

-x^2 +10x-24

This one has stumped me the most



Thank you for taking the time in helping me resolve my problems