Abus and a car move towards each other. the speed of the bus is 50 km per hour, and the speed of the car is 70 km per hour. how much closer to each other are they becoming every hour?

Find the volume of the described solid. the solid lies between planes perpendicular to the x-axis at x = 0 and x=7. the cross sectionsperpendicular to the x-axis between these planes are squares whose bases run from the parabolay=-31x to the parabola y = 30/x. a) 441b) 147c) 864d) 882