Find the surface area of a sphere with a radius of 30 m. leave your answer in terms of pi @directrix

If square root x = -7, then x= -49 true or false

Aman is 6 feet 3 inches tall. the top of his shadow touches a fire hydrant that is 13 feet 6 inches away. what is the angle of elevation from the base of the fire hydrant to the top of the man's head?

Which shows one way to determine the factors of 4x3 + x2 – 8x – 2 by grouping?