On a recent glider flight, Lucy took a tow to 3000 feet above ground level. She found a good thermal draft and climbed 1800 feet higher.
Then she hit a big gap and lost 2250 feet.
What was her altitude at that point?
A 2600 feet
B.
2550 feet
-2600 feet
D
-2550 feet

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)