Answer:
y = 
Step-by-step explanation:
y = log 5 2x
inverse ------> y=x
x = log 5 2y

y = 
I pretty sure the best answer would be f(x)=cbrt(27-x)
cbrt means cube root by the way.
A ) A graph of the equation is in the attachment.
B ) The vertex
( 0, -10 )C ) The graph of y = x² is translated for 10 units down.
tan A = height /base = 2/3