A circle with area 9pi has a sector with a central angle of 17/9 pi radians. what is the area of the setor

Find the value of the cosine for angle a

Given the parent function of [tex]f(x)=x^4[/tex], what change will occur when the function is changed to [tex]f(\frac{1}{2} x)[/tex]?

Answer this question! 30 points and brainliest! only if you know the answer.