We use cookies to personalise content and advertisements and to analyse access to our website. Furthermore, our partners for online advertising receive pseudonymised information about your use of our website. cookie policy and privacy policy.
 
+0  
 
0
49
2
avatar

The equation y = -16t^2 - 18t + 405 describes the height (in feet) of a ball thrown downward at 18 feet per second from a height of 405 feet from the ground, as a function of time t, in seconds. In how many seconds will the ball hit the ground?

 Nov 24, 2019
 #1
avatar+28289 
+2

Simply set y = 0 (as the ground is at height 0) and solve the resulting quadratic equation for t.

 Nov 24, 2019
 #2
avatar+10810 
0

The equation y = -16t^2 - 18t + 405 describes the height (in feet) of a ball thrown downward at 18 feet per second from a height of 405 feet from the ground, as a function of time t, in seconds. In how many seconds will the ball hit the ground?

laugh

 Nov 24, 2019

20 Online Users

avatar
avatar