The problem is attached to the post
I really dont know how to turn that into a graph
Use the definition of Cosine:
If P = L then
If x = 0 then d = w
I'll leave this part for you.
That depends on how fast the life-guard is able to run or to swim.
Maxiumum way to run = 3w
Maximum way to swim =
Let denote the running speed and the swimming speed then the lifeguard will swim if