The first one is 621 and the second one is C
Answer:
C
Step-by-step explanation:
C is not a function because 5 has two y values
Y = -2(x-5)^2 + 4
Note: vertex form is 0, f(x), y, or nothing= a(x-h)^2 + k
The opposite of the x value of the vertex is h
The y value value of the vertex is k.
Find a. Plug in (6,-10)
-10 = a(6-5)^2 + 4
-10 = 1a + 4
-10 = 5a
a = -2
Answer:
4pi
Step-by-step explanation:
Circle circumference = 2*pi*r
2*pi*2
4*pi
