+0  
 
+1
79
2
avatar+316 

The equation $y = -6t^2 + 51t$ describes the height (in feet) of a projectile launched from the surface of Mars at 51 feet per second. In how many seconds will the projectile first reach 108 feet in height?

 Jul 12, 2020
 #1
avatar+2306 
+2

Let's set the equation to

 

-6t^2+51t=108

 

Try if you can solve the equation :D

If you can't, I'll try to help!

 Jul 12, 2020
 #2
avatar+26620 
+1

Just put in 108 fr 'y' in your equation ...then solve for 't' using quadratic formul or factoring.... throw out any negative values for t

 

108 = -6t2 + 51 t

-6t2+51t - 108 = 0     now use quadratic formula or factoring to find the values of 't'

 Jul 12, 2020

15 Online Users

avatar
avatar