Need help urgently on the following question. ?
Really confused with a and b. I’f someone could help that would be great.
- az_lenderLv 71 month ago
This question makes no sense at all. Your teacher is an idiot. What is "x", is it time, or is it a spatial coordinate? "At 2.13 seconds" makes no sense since there is no "t" in the original equation.
If he/she really meant y = 17t^3 - 2t + 2, the speed would be
dy/dt = 51t^2 - 2, so the object would not be in motion
when t = sqrt(2/51).
The speed is dy/dt = 51t^2 - 2, as we said above. Plug in t = 2.13s.
The acceleration is d2y/dt2 = 102t, again plug in t = 2.13s.
But you were never told what units the "y" is being measured in, so you'd still have no idea what to say about the speed and acceleration. Is the speed m/s, ft/s, or leagues per second?
Go to your another math or science teacher at your school to complain about this moron.