A student is standing on a 13 ft ladder painting a house. suddenly someone starts pulling the base of the ladder away so that the base moves away from the house at a rate of 4 feet per second. at the moment when the ladder is 5 ft away from the house at what rate is the top of the ladder sliding down the house?

I’m really confused and need your assist me with this question i’ve never been taught

Find all the angles that satisfy the equation cos(θ)=32

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)