When you rub your hands together on a cold day, you use friction to transforma. mecanical energy to thermal energyb. thermal energy into nuclear energyc. nuclear energy into electrical energy
d. electrical energy into electromagnetic energy?

The u-drive rent-a-truck company plans to spend $13 million on 320 new vehicles. each commercial van will cost $25 comma 000, each small truck $50 comma 000, and each large truck  $80 comma 000. past experience shows that they need twice as many vans as small trucks. how many of each type of vehicle can they buy?

Through non-collinear points there is exactly one plane.

Jack did 3/5 of all problems on his weekend homework before sunday. on sunday he solved 1/3 of what was left and the last 4 problems. how many problems were assigned for the weekend?