Let f(x)=3x^3-18x
a. Solve the equation f(x)=0 by completing the square
b. Find a domain on which f(x) is one-to-one
c. Find the inverse of f(x) on the domain from part (b). Hint: rewrite f(x) in an equivalent form that has no linear term.
The captain of a small boat sees an island 12 miles away at a bearing of N44 degrees W.
1. how far north is the island from the boat?
2. how far west is the island from the boat?
