+0  
 
0
58
1
avatar

Your math teacher threw your cell phone off one of the overlooks on theBlue Ridge Parkway. The equation representing the path it took to the depths below is given by h(t) = -10t^2 + 10t + 60 where h(t) represents the height, in meters, of your phone and t represents the time it is in the air, in seconds. How long does it take your phone to smash to the ground?

 Mar 2, 2021
 #1
avatar+118069 
+1

When it hits the ground, h  =   0       ......so.....

 

-10t^2 + 10t + 60   = 0     multiply through  by   -1

 

10t^2  -10t  - 60    =  0           divide through  by 10

 

t^2  - t  -  6  =  0       factor

 

(t - 3) ( t + 2)   =   0

 

The  first factor set to 0  gives  us what we need

 

t  - 3  =   0

 

t  =   3  (seconds to hit the ground)

 

 

cool cool cool

 Mar 2, 2021
edited by CPhill  Mar 2, 2021

69 Online Users

avatar
avatar
avatar
avatar