Your favorite anime series has episodes that are 20 minutes long. In the equation below, w is the number
of episodes you watch and t is the number of minutes you spend watching anime.
The relationship between these two variables can be expressed by the following equation:
t = 20w
Identify the dependent and independent variables.
The number of episodes you watch
The number of minutes you spend watching anime

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?