Kelly sells magazine subscriptions after work. the half-year subscriptions cost $12, and the full-year subscriptions cost $20. today, kelly has 20 subscription cards with her, only one subscription can be ordered on each card, and she wants to sell subscriptions totaling at least $300. if the solution region represents the amount of half-year and full-year magazine subscriptions kelly needs to sell to reach her goal, which graph's shaded area represents the solution region?

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