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.

What is this equation in point-slope form?

Suppose there is a simple index of three stocks, stock abc, stock xyz, and stock qrs. stock abc opens on day 1 with 4000 shares at $3.15 per share. stock xyz opens on day 1 with 5000 shares at $4.30 per share. stock qrs opens on day 1 with 6000 shares at $4.60 per share. the price of stock abc on day 8 begins at $3.50. the price of stock xyz on day 8 begins at $3.90. stock qrs opens on day 8 with a price of $4.50 per share. assume that each stock has the same number of shares that it opened with on day 1. what is the rate of change of this simple index over 1 week?

In the given triangle, ∠aed ∼ ∠ abc, ad = 6.9, ae = 7.2, de = 5.2, and bc = 10.2. find the measure of bd and ce. round your answer to the nearest tenth.