Write an equation of the ellipse with foci (+\- 2, 0) and co verticals at (0,+\-4)

first, you divide the triangle in two, tô form a retangle triangle. after, using pythagoream theorem:

18^2 = 14^2 + (x/2)^2

(x^2/4) + 196 = 324

x^2/4 = 324 - 196

x^2/4 = 128

x^2 = 512

x = √512

x = √2^9

x = 16√2 cm

i hope i you.

the answer is b.

64

step-by-step explanation:

c=2πr=2·π·8≈64

the best estimate is 3 because   8 can only go into 24 3 times