The freezing point of helium is 0.95 Kelvin. What is this temperature in degrees Fahrenheit?

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 parabola x= √y-9 opens: a.)up b.)down c.)right d.)left

Im literally having a mental breakdown