math
posted by Taina .
If a stone is tossed from the top of a 210 meter building, the height of the stone as a function of time is given by h(t) = 9.8t2 – 10t + 210, where t is in seconds, and height is in meters. After how many seconds will the stone hit the ground? Round to the nearest hundredth’s place; include units in your answer.

math 
Reiny
set
0 = 9.8t^2  10t + 210
use the quadratic formula, where
a = 9.8
b = 10
c = 210
I got 4.14 seconds
Respond to this Question
Similar Questions

Math
If a stone is tossed from the top of a 230 meter building, the height of the stone as a function of time is given by h(t) = 9.8t2 – 10t + 230, where t is in seconds, and height is in meters. After how many seconds will the stone … 
dade
If a stone is tossed from the top of a 250 meter building, the height of the stone as a function of time is given by h(t) = 9.8t2 – 10t + 250, where t is in seconds, and height is in meters. After how many seconds will the stone … 
Math
If a stone is tossed from the top of a 330 meter building, the height of the stone as a function of time is given by h(t)=9.8t^210t+330, where t is in seconds, and height is in meters.After how many seconds will the stone hit the … 
math
if a stone is tossed from the top of a 330 meter building, the height of the stone as a function of time is given by h(t)=0.8t^210t+330, where t is in seconds, and height is in meters. After how many seconds will the stone hit the … 
math
If a stone is tossed from the top of a 250 meter building, the height of the stone as a function of time is given by h(t) = 9.8t2 – 10t + 250, where t is in seconds, and height is in meters. After how many seconds will the stone … 
math
If a stone is tossed from the top of a 250 meter building, the height of the stone as a function of time is given by h(t) = 9.8t2 – 10t + 250, where t is in seconds, and height is in meters. After how many seconds will the stone … 
math
If a stone is tossed from the top of a 330 meter building, the height of the stone as a function of time is given by h(t) = 9.8t2 – 10t + 330, where t is in seconds, and height is in meters. After how many seconds will the stone … 
Algebra
If a stone is tossed from the top of a 290 meter building, the height of the stone as a function of time is given by h(t) = 9.8t2 – 10t + 290, where t is in seconds, and height is in meters. After how many seconds will the stone … 
algebra
If a stone is tossed from the top of a 230 meter building, the height of the stone as a function of time is given by h(t) = 9.8t2 – 10t + 230, where t is in seconds, and height is in meters. After how many seconds will the stone … 
math
f a stone is tossed from the top of a 330 meter building, the height of the stone as a function of time is given by h(t) = 9.8t2 – 10t + 330, where t is in seconds, and height is in meters. After how many seconds will the stone …