I put a ladder 1.5m away from a tree. the ladder is inclined at 70 above the horizontal

Describe all the numbers that when rounded to the nearest thousand are 645,000

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

Using elimination, what is -4x+2y=-12 4x+8y=-24