What fraction is bigger 13/15 or 21/25 really need answer urgently

Suppose the probability of selling a car today is 0.28. find the odds against selling a car today.

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?

The length of a rectangle plus its width is 24 cm. the area is 143 square cm. what are the length and width of the rectangle?