Ben can address the weekly newsletters in 4 hours, Charlie can address them in 3 hours. How long would it take them to address the newsletters if they work together?

Select the two pairs of figures that are similar.

You use technology ans find a sum of 6.712e-8. write this sum in standard form

The length of a rectangular board is 3 feet less than twice its width. a second rectangular board is such that each of its dimensions is the reciprocal of the corresponding dimensions of the first rectangular board. if the perimeter of the second board is one-fifth the perimeter of the first, what is the perimeter of the first rectangular board?