In the figure, m and n are rays. Which statements are true? Select each correct answer. m∠3=120°
m∠2=60°
m∠1=60°
m∠3=m∠1
Please hurry, I'm doing last minute studying for a semester exam!

Serena is making an experiment. for that, she needs 20 grams of a 52% solution of salt. she has two large bottles of salt water: one with 40% and the other with 70% of salt in them. how much of each must she use to make the solution she needs? i am in need of