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^2-10t+330, where t is in second, and height is in meters. After how many secondes will the stone hit the ground. Round to the nearest hundreths place; include units in your answer.

Question

anonymous · Answer

solve the eqution for t when h=0

anonymous · Answer

how do I do that

alexwee123 · Answer

you would make h=0 and use quadratic formula to find out the value of "t" that is positive

anonymous · Answer

$$0=-9.8t-10t+330$$$$h(t)=-9.8t-10t+330$$

anonymous · Answer

$$t=quadratic formula$$

anonymous · Answer

Thank you, I am so totally lost with this quadratic formula part of this class.

anonymous · Answer

Plug into the quadratic formula a=-9.8, b=-10, c=330

anonymous · Answer

$$ t=(10\pm \sqrt(10^2-4(-9.8)(330))/2(-9.8)$$

anonymous · Answer

t=5.32

anonymous · Answer

I dont know what i did but I kept coming up with 5.34 but thank you so very much.