A population that initially has 20 birds approximately doubles every 10 years. Which graph represents this population growth.

Enter the number of complex zeros for the polynomial function in the box. f(x) = x+ + 5x² +6

Lisa has three classes that each last 50 minutes. what is the total number of minutes of the three classes

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?