Stem question, can you plz tell me 3 types of natural water vapor other that steam, fog, and clouds, thanks.

Aprojectile is thrown upward so that its distance above the ground after t seconds is given by the function h(t) = -16t2 + 704t. after how many seconds does the projectile take to reach its maximum height?

Find the value of x for which line a is parallel to line b

Ineed with question three. i don't understand how i'm supposed to achieve 3 marks.