Help now for brainliest,5stars and thanks. Find the values of x in the range 0≤x≤180° for which 15sin^2 x+11cox-17=0

Don't know how to find x given these segment lengths

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

If jobs arrive every 15 seconds on average, what is the probability of waiting more than 30 seconds?