more limits and derivatives XD

Question

lovelyharmonics · Answer

The position of an object at time t is given by s(t) = -8 - 9t. Find the instantaneous velocity at t = 1 by finding the derivative.

anonymous · Answer

you know how to calc the derivative of the above formula?

anonymous · Answer

just what it says
take the derivative, plug in 1

anonymous · Answer

since $s(t)=-8-9t$ is a line, the derivative is the slope of the line, it is a constant, so it really has nothing to do with time 1 or any other time

anonymous · Answer

wrong post!

lovelyharmonics · Answer

oh my satellite.... thats why you dont bite off more than you can chew ;)

lovelyharmonics · Answer

okay so -8-9(1)=-17

anonymous · Answer

not really lovely

anonymous · Answer

s'(t) = -9 regardless of what t is ;)

anonymous · Answer

@satellite73  said the same above

anonymous · Answer

I just don't see how a velocity can be -9 ??? It can get down to zero but negative???

anonymous · Answer

velocity is just speed except it could be negative i..e you are going in reverse
in this case you are going to the left

anonymous · Answer

@satellite73 ah ok, sort of like a vector, thanks buddy

anonymous · Answer

so did @lovelyharmonics get the answer or still wondering ?

lovelyharmonics · Answer

im good c: lol thank you