Two gears are adjusted so that the smaller gear drives the larger one. The radius of the smaller gear is 3.7 cm and the radius of the larger gear is 6.9cm. If the smaller gear rotates through an angle of 300°, through how many degrees does the larger gear rotate?

Taking algebra two apex courses and need with these questions

[10 points, algebra 2]according to my answer key the restrictions are -1 and 4. but why not positive 1?

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?