Applications - Introduction to Functions  TOPIC_SOLVED

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Applications - Introduction to Functions

Postby bellerum23 on Fri Oct 25, 2013 9:46 pm

A bullet shot straight up is s feet above the ground after t seconds, where s = f(t) = -16t^2 + 256t. Find the height of the bullet 3 seconds after it is shot.
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Re: Applications - Introduction to Functions

Postby little_dragon on Sat Oct 26, 2013 12:27 am

bellerum23 wrote:A bullet shot straight up is s feet above the ground after t seconds, where s = f(t) = -16t^2 + 256t. Find the height of the bullet 3 seconds after it is shot.

this 1 works just like UR other 1:
put 3 in for t & simplify to get s
:wave:
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Re: Applications - Introduction to Functions

Postby bellerum23 on Sat Oct 26, 2013 12:41 am

little_dragon wrote:
bellerum23 wrote:A bullet shot straight up is s feet above the ground after t seconds, where s = f(t) = -16t^2 + 256t. Find the height of the bullet 3 seconds after it is shot.

this 1 works just like UR other 1:
put 3 in for t & simplify to get s
:wave:


So put it like this:

f(3) = -16(3)^2+256(3)

Is the answer = 624
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Re: Applications - Introduction to Functions  TOPIC_SOLVED

Postby theshadow on Sat Oct 26, 2013 1:22 am

bellerum23 wrote:So put it like this:

f(3) = -16(3)^2+256(3)

Is the answer = 624

I get that number but "the answer" probably has to have units to be right.
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