What size cap would someone with a head circumference of 570 mm need?

What is the range of the relation in the table below? x y –2 0 –1 2 0 4 1 2 2 0

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

Given that δabc is similar to δdef, which is a possible trigonometric ratio for ∠d? a) tan d = 24 30 b) tan d = 30 24 c) tan d = 18 24 d) tan d = 24 18