Part 5: Common Core Practice Lesson 9
4
Sammy, Teddy, and Ursula ran a 100-meter race. Sammy's time was 15.03 seconds. Teddy's and
Ursula's times were 14.7 seconds and 15.003 seconds, respectively. Which statements are true?
Circle all that apply.
A Teddy ran 0.04 second faster than Ursula.
B Teddy came in 3rd place.
C Ursula ran 0.027 second faster than Sammy.
D
The time between the slowest and fastest run was 0.33 second.

Find a parametrization for the curve「and determine the work done on a particle moving along γ in r3 through the force field f: r^3--r^3'where f(x,y,z) = (1,-x,z) and (a) im (γ) is the line segment from (0,0,0) to (1,2,1) (b) im (γ) is the polygonal curve with successive vertices (1,0,0), (0,1,1), and (2,2,2) (c) im (γ) is the unit circle in the plane z = 1 with center (0,0,1) beginning and ending at (1,0,1), and starting towards (0,1,1)