SOLUTION: I have a problem that I need help with, I also need the steps and the x & y points to graph it, here is the problem (4.9)t2=D and question I have to answer with the problem is

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Question 660938: I have a problem that I need help with, I also need the steps and the x & y points to graph it, here is the problem
(4.9)t2=D
and question I have to answer with the problem is: a body fell out a window from 155 meters up, how many seconds did it take the person to land.
I hope you can help me
Thank You
Answer by josmiceli(19441) About Me  (Show Source):
You can put this solution on YOUR website!
+4.9t%5E2+=+D+
(a)
Make +t+=+0+
then +D+=+0+
So the graph goes through (0,0)
Make +t+=+1+
+D+=+4.9+
Graph goes through (1,4.9)
Here's the graph:
+graph%28+400%2C+400%2C+-2%2C+10%2C+-10%2C+200%2C+4.9x%5E2%29+
given:
+D+=+155+
+4.9t%5E2+=+155+
+t%5E2+=+155%2F4.9+
+t+=+sqrt%28+155%2F4.9+%29+ sec