The answer in this question is broadcast. Refer to curriculum topic: 5.1.3 On Ethernet networks, the broadcast MAC address is 48 binary ones displayed as hexadecimal FF-FF-FF-FF-FF-FF. So the hexadecimal address FF-FF-FF-FF-FF-FF represents broadcast the MAC address. The broadcast MAC address is a 48 binary.
Answer:
9 should be added to both sides of the equation to complete the square.
Step-by-step explanation:
Given : 
To Find: What number should be added to both sides of the equation to complete the square?
Solution:

Add the square of half of coefficient of x
So, the square of half of coefficient of x = 
So, 




Thus 9 should be added to both sides of the equation to complete the square.
Answer:
about 65°
Step-by-step explanation:
Using the tangent ratio in the right triangle
let x be the angle of elevation ( measured up from the horizontal )
tanx =
=
, thus
x =
(
) ≈ 65°
So, you're multiplying two consecutive numbers. One of them must be even, and if a factor of a product is even, the result will be even.