A20% acid solution is mixed with a 70% acid solution to get 50 liters of a 40% solution. which of the following expressions is equal to 4(50)?
a.) 0.2x + 0.7y
b.) 2x + 7y
c.) x + y

Astudent completed a lab report. which correctly describes the difference between the “question” and “hypothesis” sections of her report? “question” states what she is asking, and “hypothesis” states the result of her experiment. “question” states what she is asking, and “hypothesis” states what she thinks the answer to that question is in “if . . then . . because” format. “question” describes what she is trying to find out, and "hypothesis" states the procedures and methods of data collection. “question” describes what she is trying to find out, and “hypothesis” states any additional information or prior knowledge about the question.