50 points will give brainliest! evaluate the expression. show your work. 6 x y - 3^2 x 9 + 4^3

Which equation can be used to measure the density of water in a spherical water tank? let w represent the number of water particles within the region.

What is the y-intercept of the line with the equation 3x + 4y = 12?

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)