Is 2/3 greater than 7/8

What is the volume of a rectangular prism if the length is 10.4 mm the width is 5 mm in the height is 8 mm

The weight of an object in a particular scale is 175.2 lbs. the measured weight may vary from the actual weight by at most 0.1 lbs. what is the range of actual weights of the object

What is the length of the segment, endpoints of which are intersections of parabolas y=x^2− 11/4 x− 7/4 and y=− 7 /8 x^2+x+ 31/8 ?