Anyone? ?

due to predation on the island, the population of shrews is decreasing at a rate of 17 animals per month. if the population of shrews in march is 715, how many shrews will be on the island in october of the same

Jody bought 20 shares of amazon at the close price of $121.00. she bought 20 more shares a year later at the price of $127.00. two years later, she sold all of her shares at the price of $133.00. her broker charges $50 for each transaction. after all of these transactions, how much money did jody make?