PLEASE HELP ME OUT WITH THIS PLEASE!!( and if you can with my recent questions too most of them are not answered and it would really help me out because I have no clue on how to do them)

For f(x)=2x+3 and g(x)=x^2- 8 find (f+g) (x)

The suare root of 9x plus 7 plus the square rot of 2x equall to 7

A. use the formula for continuous compounding with the original example: $1000 invested at 2% for 1 year. record the amount to 5 decimal places. use a calculator. b. compare it to the result using the original compound interest formula with n = 365 calculated to 5 decimal places. which has a larger value? explain.