The grass on Julie's lawn was 4.5 centimeters tall right after she mowed it. Then the grass grew at a rate of 2.1 centimeters per week.
Which equation models the relationship between h, the height of the grass in
centimeters, and w, the number of weeks since Julie mowed?
O w = 2.1h + 4.5
O w = 4.5h + 2.1
O h = 2.1w. + 4.5
O h = 4.5W + 2.1

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?