slope = 
the slope is the value of f' (36)
f(x) = √x = 
f'(x) =
= 
f'(36) =
= 
I'm assuming that subtraction sign is mean to be an equals sign. If that is true than the answer is 403.75.
Yes, I can solve that inequality.
Any value of ' r ' that's less than 1/3 is a solution.
Multiplications that give 35
7*5