What is the difference between speed and velocity?
A. Speed measures an object's change in position, while velocity measures an object's change in position per unit time.
B. Velocity measures an object's rate and direction of motion, and speed measures rate only.
C. Velocity and speed both measure an object's change in position, but velocity only depends upon the object's speed.
D. Speed measures an object's change in position per unit time, while velocity measures an object's change in speed per unit time.

Its B

Step-by-step explanation:

Because speed is the distance traveled by an object and velocity is distance traveled by an object per unit time in a particular direction.

if the eqn of the parabola is f(x) = (x-4)(x+2), we need to mult. this out to find the coordinates of the vertex.

then f(x) = x^2 + 2x - 4x - 8, and f(x) = x^2 - 2x - 8.

one way in which you can find the vertex is to calculate x = -b / (2a).   here, that comes to

        )

x = = 1.   f(1) = 1^2 - 2(1) - 8 = - 9.   vertex is at (1, -9).

        2(1) 

find another point on the curve:   let x=0, for which y=-8.   then (0, -8) is on the curve.   plot the vertex and this point and draw a smooth parabola thru both.

hope this

answer: an 8-foot rope is tied from the top of a pole to a

stake in the ground, as shown in the diagram

below

step-by-step explanation: