79 dollars divided by 50 pounds equals 1.58 so he made 1.58 dollars for every 1 pound so for question 10 thomas traded 160 pounds so 160 times 1.58 which equals 252.8 and for question 11 we just answered it to get question 10. question 10 is ~~$252.8~~ and question 11 is ~~$1.58~~
