2. Gayle is hiking the Appalachian Trail. The base of the mountain is 6 feet below sea level. She takes a rest at 10 feet above sea level. How many
vertical feet has Gayle hiked?

Write each expression in exponential form and find its value. 3 x 3 x 3

Identify the type of observational study described. a statistical analyst obtains data about ankle injuries by examining a hospital's records from the past 3 years. cross-sectional retrospective prospective

The management of a supermarket wants to adopt a new promotional policy of giving a free gift to every customer who spends more than a certain amount per visit at this supermarket. the expectation of the management is that after this promotional policy is advertised, the expenditures for all customers at this supermarket will be normally distributed with a mean of $95 and a standard deviation of $20. if the management wants to give free gifts to at most 10% of the customers, what should the amount be above which a customer would receive a free gift?