.....How far from the post is the chain when it is 50cm from the ground? Write your answer correct to 2 decimal places

Question

A chain is hanging between two posts so that its height above the ground h, in centimeters, can be determined by h = 0.0025x2 - 0.9 + 120, where x is the horizontal distance from one post in centimeters.....

Answer 1

You have a formula for height given distance from one post. Plug 50 in for h. Set the equation =0. Solve for x using quadratic formula.