Matthew made a fruit salad, in which the ratio of blueberries to red grapes is 8: 6. if matthew used 28 blueberries, how many red grapes did he use? [type your answer as a number.]

Solve: 25 points find the fifth term of an increasing geometric progression if the first term is equal to 7−3 √5 and each term (starting with the second) is equal to the difference of the term following it and the term preceding it.