(a)at cheng's bike rentals, it costs $38 to rent a bike for 8 hours. how many dollars does it cost per hour of bike use?
(b)linda bought 10 pounds of sugar for $6 . how many dollars did she pay per pound of sugar?

Given δjkl : δxyz, find x. a)10 b)12 c)16 d)20

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

The floor of a building consists of 3000 tiles which are rhombus shaped and each of it's diagonals are 45 cm and 30 cm in length. find the total cost of polishing the floor, if the cost per m² is rs. 4.