An 8-oz bottle of ketchup costs $1.39. if the unit rate stays the same, how much should a 14-oz bottle cost? $0.79 $2.43 $2.78 $1.45

Element x decays radioactively with a half life of 8 minutes. if there are 450 grams of element x, how long, to the nearest tenth of a minute, would it take the element to decay to 37 grams?

Use matrices to solve this linear system: 5x1 − 2x2 = −30 2x1 − x2 = −13 x1 = x2 =

Paul needs to buy 5/8 pound of peanuts. measure a pound into sixteenths. what measure is equivalent to 5/8 pound