Virginia needed some batteries for her flashlights. She bought 4 batteries for $6.80. At that rate, how much would 10 batteries cost?

Why do interests rates on loans to be lower in a weak economy than in a strong one

One of the inventors of integrated circuits observed that the number of transistors that fit on an integrated circuit will double every 24 months. what type of relationship most appropriately models this situation?

Show your workcan a right triangle have this sides? *how to prove it without using the pythagorean theorema*