19. Samantha wants to add at least 40 fish to her new tank, She cannot use more than 25 of Fish A or more than 30 of Fish B Fish A cost $5
each and Fish B cost $3 each. How many of each fish should she
use in order to minimize the cost?

The amount of energy it takes to lift a box might be a function of which of the following

How do you solve a question like this?

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?