数学几道····

saiko13

A store purchased a Brand c computer for the same amount that it paid for a brand D computer and then sold them both at a high prices. The store's gross profit on the Brand C computer was  what percent greater than its gross profit on the brand D computer?
(1) the price at which the store sold the brand c computer was 15% greater than the price at which the store sold the brand computer
(2) the store's gross profit on the brand d computer was $300


For each positive integer n, the integer n* is defined by n*=n^2+1, what is the value of the positive integer k?
(1) when k is divided by 4, the remainder is 1
(2) 18<=k<=36   选B