Jane wants to go to her school's Prom Night. A ticket costs $120. Jane saved $30 months ago, however to earn the remaining amount she started to work as a part time dog walker. For each hour that she walks the dog she earns $5. Determine the inequality which can be used
to find the minimum number of hours jane must walk the dog to earn enough to pay for a prom ticket.

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)