Please help me and make sure to round the answers to the nearest hundred. I’ll give you brainiest!

An architect is designing a water fountain for a park she uses the given function to model the water jet flowing from the fountain nozzles where h(x) gives the height of the water jugs in feet x feet from the starting point h(x)=-1/20x+x+15

The midpoints of the sides of the large square are joined to form a smaller square. what is the area of the smaller square

Louis wants to carpet the rectangular floor of his basement the basement has an area of 864 square feet the width of the basement is 2/3 its length what is the length of lewis's basement