Question

A point is moving along the graph of a given function such that dx/dt is 2 centimeters per second. Find dy/dt for the given values of x.
y = 9x2 + 5
(a) x = -1
dy/dt =____ cm/sec

(b) x = 0
dy/dt =____cm/sec

(c) x = 3
dy/dt =_____ cm/sec

Answer 1

\[y'=18xx'\] and you are told that
\[x'=0\] so you get
\[y'=36x\] just plug in the numbers

Answer 2

sorry i mean you are told that
\[x'=2\]

Answer 3

this one is mile easier than the first ones. i wonder why they get easier.

Answer 4

I have is the question I am trying to take my ASVAB test and this question I do not get at all 4! that is all the information they give

Answer 5

4!

Answer 6

what?

Answer 7

@navyman are you asking about
\[4!\] did you get lost in this post? am i hallucinating?

Answer 8

so satletite what would the numbers be like hwat am i plugging in

Answer 9

@lostdove all you have to so is write
\[\frac{dy}{dt}=36x\] and so first one is
\[36\times -1=-36\] second one is
\[36\times 0=0\] third one is
\[36\times 3=108\] easy an done

Answer 10

thanks:)

Answer 11

yw