Do not round your answer. type in just the number. 3 is 15% of what number?

Can someone me and do the problem plz so i can understand it more better

Which equation represents a line that is parallel to the line whose equation is 3x-2y=7( show all work)

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