##### solving a quadratic equation with irrational roots

 Mathematics Tutor: None Selected Time limit: 1 Day

A ball is thrown from an initial height of

meter with an initial upward velocity of

. The ball's height

(in meters) after

seconds is given by the following. H=1+25t-5t^2

Find all values of

for which the ball's height is

meters.

Apr 30th, 2015

h=1+25t-5t^2

v=25-10t....velocity equation

maximum height v=0

t=2.5 seconds

substituting

h=1+62.5-5*6.25

solving

63.5-31.25

Apr 30th, 2015

A ball is thrown from an initial height of

1

meter with an initial upward velocity of

25/ms

. The ball's height

h

(in meters) after

t

seconds is given by the following.

H=1+25t-5t^2

Find all values of

t

for which the ball's height is

6

meters.

the question was not entered fully

Apr 30th, 2015
Apr 30th, 2015

thanks a lot..................look forward to working with you.

Apr 30th, 2015

could you help me set it up to get the right number for the square root cause i got -751 with positive 38 but with -38 i got 769 i confuse my signs when im supposed solve the 4*ac part

A ball is thrown from a height of

38

meters with an initial downward velocity of

3/ms

. The ball's height

h

(in meters) after

t

seconds is given by the following.

h=38−3t-5t2

How long after the ball is thrown does it hit the ground?Round your answer(s) to the nearest hundredth.

Apr 30th, 2015

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Apr 30th, 2015
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Apr 30th, 2015
May 27th, 2017
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