2 Answers | Add Yours
You want to solve
-9.8t^2 - 10t + 330 = 0
Use the quadradic formula
`t = (-b+-sqrt(b^2-4ac))/(2a)`
t = 6.335 sec or -5.315 sec.
Obviously time is only positive so the answer is 6.335 seconds
well the stone hits the ground when the height = 0
And here you have given a height function
so we only need to set it equal to zero.
Using quadratic formula ((-b+/-sqrt(b^2-4ac))/2a
plugging in all the numbers
a= -9.8 b- -10 c= 330
the answer is 6.335 or -5.315 and the unit is seconds.
Since time really couldn't be negative, (time machine?)
the only legitmate answer to this question is 6.335 seconds
We’ve answered 317,289 questions. We can answer yours, too.Ask a question