Answer:
first, arrange the numbers then classify the number into two like if there are 7 numbers classify into three then the middle one will be the median
Answer:
Correct, as 4 is the only number repeating twice
check the picture below.
make sure your calculator is in Degree mode.
Answer:
12.686cm
Step-by-step explanation:
By using pythagoras, we can find CB.
We know that 
Therefore, 
(it has to be positive since it is distance)
now we look at triangle BCD and use SOH CAH TOA.

Answer:
6 red balls
Step-by-step explanation:
The probability in the first pick
6/21
The probability in the second pick (without replacement)
5/20
the requested probability
(6/21)(5/20) = 30/420
simplification
30/420 = 3/42 = 1/14
Hope this helps