the function f(x)=2.75x^2 models the packaging costs in cents for shipping a book with the side lengths in inches shown in the diagram what are reasonable domain and range values for this function

1. are the triangles similar and if so why? what is the value of x? show your work.

Marquise has 200 meters of fencing to build a rectangular garden. the garden's area (in square meters) as a function of the garden's width w w (in meters) is modeled by: a ( w ) = − w 2 + 1 0 0 w a(w)=−w 2 +100w what side width will produce the maximum garden area? meters

What is the value of x? assume that the line is tangent to the circle.