In two or more complete sentences write and solve an equation for the situation and explain how you will solve the equation. after an 8-week exercise program grace lost 45 pounds. she now weighs 122 pounds. how much did grace weigh before she started her exercise program?

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?