Choose the best Spanish word to complete the sentence. Alan y Enrique amigos. es están son está

Jim has found that he must consume 2,300 calories a day to reach his health goals, but he doesn't want to give up his afternoon snack of pretzels. unfortunately, he tends to eat the entire bag — which amounts to 1,300 calories! what strategy should jim use to improve his habits?

How many liters of 60% alcohol solution should be added to 40 liters of a 20% alcohol solution to make a 50% solution?

What is 7/81 as a percentage? round your answer to the nearest tenth of a percent.