Her exercise today, amanda plans to both run and swim. let r be the number of laps she runs and let s be the number of laps she swims. each lap she runs takes her 5 minutes, and each lap she swims takes her 3 minutes. she wants to exercise for more than 30 minutes today. using the values and variables given, write an inequality describing this.

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?