David has a rectangle and a right triangle. -The length of the rectangle is 5 more than its width, w.
-The length of the shorter leg of the triangle is equal to the rectangle's width.
-The length of the longer leg of the triangle is twice the length of the rectangle.

Which function f(w), represents the combined area of the rectangle and the triangle?
A) f(w)=2w^2+10w
B) f(w)=3w^2+15w
C) f(w)= w^2+10w+25
D) f(w)= w^2+15w+50