Graphing Quadratic Functions — Test Answers

A toy rocket is launched vertically upward from ground with an initial velocity of 128 feet per second. The equation h⁡(t)=−16⁢t^2+128⁢t represents the height, h , of the rocket t seconds since it was launched. How long will it take for the rocket to return to the ground? Enter your answer in the box.

A function is given. y=3⁢x^2−18⁢x+25 What is the equation of the axis of symmetry for the graph of the function? Enter your answer in the box.

The height of a hill, h of x , in a painting can be written as a function of x , the distance from the left side of the painting. Both h of x and x are measured in inches. h of x is equal to negative 1 fifth x open paren x minus 13 close paren What is the height of the hill in the painting 3 inches from the left side of the picture?

The function relating the height of an object off the ground to the time spent falling is a quadratic relationship. Travis drops a tennis ball from the top of an office building 90 meters tall. Three seconds later, the ball lands on the ground. After 2 seconds, how far is the ball off the ground?

The function f of x is equal to negative open paren x minus 20 close paren times open paren x minus 100 close paren represents a company’s monthly profit as a function of x , the number of purchase orders received. Which number of purchase orders will generate the greatest profit?