(c) Without assuming anything about the distribution of times, what can be said about the percentage of times that are either less than 26 minutes or greater than 38 minutes

What is the y-intercept of the line given by the equation

Which of the following transformations will always produce a congruent figure?

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?