Roman bought a total of 15 bottles of drinks for his team. each drink was either a bottle of water or a bottle of juice. he spent $1.50 on each bottle and $3.00 on each bottle of juice. roman spent a total of $28.50. identify your variables and write a system of equations. how many bottles of juice did he buy?

The ages of personnel in the accounting department of a large company are normally distributed with a standard deviation of 7 years. there is a 0.02275 probability that the age of any randomly chosen person in the department is less than 22 and 0.15866 probabilty that the age of any randomly chosen person is greater than 43. what is the mean of this distribution?