What is the rule for rotating (-5,8) 270 degrees counter-clockwise around the origin

Suzanne began a trip with 18 1/2 gallons of gas in the gas tank of her car if she hughes 17 3/4 gallons on the trip how many gallons does she have left once she finish the trip

Hello, i need compare km^2 and km. what's difference in this?

Ahyperbola centered at the origin has a vertex at (-6,0) and a focus at (10,0)