Write the equation in standard form for the hyperbola with vertices (-9,0) and (9,0), and a conjugate axis of length 12

If sr is 4.5cm and tr is 3cm, what is the measure in degrees of angle s?

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?

An ant travels at a constant rate of 30cm every 2 minutes.at what speed does the ant travel per minute