Clare buys some shares for $50x. Later, she sells the shares for $(600 + 5x). She makes a profit of 2%
It can be shown that x2 + 90x – 1200 = 0
Solve x2 + 90x – 1200 = 0
Find the value of x correct to 3 significant figures.

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)