What would happen if you took a lid off of a jar of helium

Jasmine is diving off a 3-meter springboard. her height in meters above the water when she is x meters horizontally from the end of the board is approximated by the equation h=-x^2+3x+3. what is the maximum height jasmine will reach on her dive?

The diagram shows a series of volcanic island and a hot spot determine the direction of movement of the tectonic plate that for the island

Gordon is going for a run through the park, but it is cold outside. the low outside temperature could affect his personal safety.