Is 55000 mg greater than, less than, or equal to 2 kg?

What is the probability of drawing three queens from a standard deck of cards, given that the first card drawn was a queen? assume that the cards are not replaced.

What is the axis of symmetry of the function f(x)=-(x+ 9)(x-21)

A25- foot ladder leans against a building and reaches a point of 23.5 feet above the ground .find the angle that the ladder makes with the building