Perpendicular to y=1/3x-2 and passing through the origin

Calculate the density of benzene if 300ml of it weighs 263g. a. 0.88 g/ml b. 1.14 g/ml c. 78,900 g/ml d. 37 g/ml

What is the equation of the line that is parallel to the line with the equation y= -3/4x +1 and passes through the point (12,-12)

V=x^4-y^4 pick three expressions that can represent the three dimensions of the prism (each in meters)