What is the low point of a sound wave where the lowest air pressure occurs?

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?

Erosion of the beach is normally a slow process. however, in certain situations, large chunks of shore may wash out to sea. what could cause this to happen?

Achlorine atom has 17 protons and 18 neutrons. what is its mass number? what is its atomic number?