What is the minimum point of the graph of y=x^2+4

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

At a sale this week, a desk is being sold for $213. this is a 29% discount from the original price. what is the original price?

Expresa commuter train leaves downtown sation and travels at a average speed of 55 miles per hour towards the north side sation, which is 50miles away. thirty minutes later, express commuter train #7 leaves north side and travels at a average speed of 35miles per hour towards downtown sation. at the moment the two trains pass each other, how far(in miles) is train #12 from the downtown sation and how long(in minutes) has the #12 train been traveling