Stitz-Zeager_College_Algebra_e-book

4 to remove the absolute values and proceed from

Info iconThis preview shows page 1. Sign up to view the full content.

View Full Document Right Arrow Icon
This is the end of the preview. Sign up to access the rest of the document.

Unformatted text preview: 6 We have already seen the graph of this function. It was used as an example in Section 1.7 to show how the graphing calculator can be misleading. 2.3 Quadratic Functions 149 7. The two towers of a suspension bridge are 400 feet apart. The parabolic cable7 attached to the tops of the towers is 10 feet above the point on the bridge deck that is midway between the towers. If the towers are 100 feet tall, find the height of the cable directly above a point of the bridge deck that is 50 feet to the right of the left-hand tower. 8. What is the largest rectangular area one can enclose with 14 inches of string? 9. Solve the following quadratic equations for the indicated variable. (a) x2 − 10y 2 = 0 for x (b) y 2 − 4y = x2 − 4 for x (e) y 2 − 3y = 4x for y (c) x2 − mx = 1 for x 7 (d) −gt2 + v0 t + s0 = 0 for t (Assume g = 0.) (f) y 2 − 4y = x2 − 4 for y The weight of the bridge deck forces the bridge cable into a parabola and a free hanging cable such as a power line does not form a parabola. We shall see in Exercise 13 in Section 6.5...
View Full Document

Ask a homework question - tutors are online