Achemist has a 30% and a 45% acid solution. what amount of each solution should be used to make 500ml of solution with 35% acidity?

27 is what percent of 108? 27 is % of 108

33% of college students say they use credit cards because of the rewards program. you randomly select 10 college students and ask each to name the reason he or she uses credit cards. find the probability that the number of college students who say they use credit cards because of the rewards program is (a) exactly two, (b) more than two, and (c) between two and five inclusive. if convenient, use technology to find the probabilities.

When a valve is open 281 gallons of water go through it in one hour the number of gallons that would go through in 94 hours is