A grocer wants to mix two kinds of coffee. One kind sells for $2.15 per pound, and the other sells for $2.45 per pound. He wants to mix a total of 18 pounds and sell it for $2.30 per pound. How many pounds of each kind should he use in the new mix? (Round off the answers to the nearest hundredth.)

Need to finish my juan wants to build a greenhouse in his back yard. he needs to maximize the ratio of floor area to structure volume in order to provide the most room for plants while minimizing the area to be heated. find the description of the structure that best meets juan’s criteria. a.) a hemisphere with a diameter of 12 feet b.) a cube with a side length of 12 feet c.) a cone with a diameter of 12 feet and a height of 10 feet d.) a square pyramid with a base side length of 12 feet and a height of 9 feet