Which statement proves the given triangles are similar?

Micheal is 4 times as old as brandon and is also 27 years older than brandon. how old is micheal

Find the vertex for the parabola given by the function ƒ(x) = −3x2 − 6x.

The roof of a farm silo is the shape of a hemisphere and is made of sheet tin. if the diameter of the silo is 126.5 feet, how much sheet tin is needed to make the roof? (use π = 3.1416.)