Walter takes of an hour to mow of an acre of lawn. at this rate, how many acres will he mow in an hour?

The length of a shadow of the building is 36m. the length of the pole, which is perpendicular to the ground, is 1.9m. the length of the pole's shadow is 1.52m. what is the height of the building?

Which of the following equations is equivalent to x/3-6/x=1

The equation of a parabola is given. y=18x2+4x+20 what are the coordinates of the focus of the parabola?