Anapkin is folded into an isosceles triangle, triangle abc, and placed on a plate, as shown. the napkin has a perimeter of 38 centimeters. to the nearest square centimeter, how many square centimeters of the plate are covered by the napkin?

16 square centimeters
30 square centimeters
56 square centimeters
60 square centimeters

if the eqn of the parabola is f(x) = (x-4)(x+2), we need to mult. this out to find the coordinates of the vertex.

then f(x) = x^2 + 2x - 4x - 8, and f(x) = x^2 - 2x - 8.

one way in which you can find the vertex is to calculate x = -b / (2a).   here, that comes to

        )

x = = 1.   f(1) = 1^2 - 2(1) - 8 = - 9.   vertex is at (1, -9).

        2(1) 

find another point on the curve:   let x=0, for which y=-8.   then (0, -8) is on the curve.   plot the vertex and this point and draw a smooth parabola thru both.

hope this

are you an artist's daughter? cuz dang you a fine piece of art, girl.