What is the surface area of a cube in which each face of the cube has an area of 7 cm2? surface area = a0 cm2?

What is not true about kl and mn? what is mn? (show your work)

Aconstruction worker has rope 9 m long he needs to cut it in pieces that are each 3 /5 m long how many such pieces can he cut without having any rope leftover?

Two airplanes start at the same place and travel in opposite directions, one at 395 miles per hour and the other at 422 miles per hour. how many hours will it take for the planes to be 2451 miles apart?