Please help me Determine an expression for f(x) in which f(x) is cubic, f(x)>=0 when x<=2, f(x)<0 when x>2, and f(0)=4. You must show your reasoning behind the function.

the answer is 99.

isaiah walks 3 miles due north, turns and then 5 miles due east. how far is he from his starting point?

a^2 + b^2 = c^2

let c = distance from starting point.

(3)^2 + (5)^2 = c^2

9 + 25 = c^2

34 = c^2

sqrt{34} = sqrt{c^2}

sqrt{34} = c