What is the length of YZ?
Y
9 ft.
51°
X

Step-by-step explanation:

take 51 degree as reference angle

using sin rule

sin 51=opposite/hypotenuse

0.77=YZ/9

9*0.77=YZ

6.93=YZ

6.9=YZ

20 people chosen to March

Step-by-step explanation:

The sample can be explained as a random subset of the population. It is a given number of draws or selection made usually at Random from the entire or larger population set. The sample is usually smaller Than the population and if done randomly will be representative of the population set. The entire spectator attending the baseball game is the population of interest while the 20 selected from the entire pool to March in the victory parade is the sample data obtained from the population set.