Which of these fractions below are the smallest and largest? 3/4 3/5 7/10 13/20

The amount spent on food and drink by 20 customers is shown below what is the modal amount spent ?

Use the given information to determine the exact trigonometric value.

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?