Free points to u fellow earthling

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

What is the number 321,000,000 in scientific notation? also what is the number? ?

You are at a restaurant and owe $38 for your meal. you want to leave a 20% tip. how much will your tip be?