Unit Test 4 A plot of land is in the shape of a
semicircle of diameter 35 metres as
shown below.
The plot was fenced by erecting posts
3 metres apart. How many posts
22
were used? (TC
7
A. 31 B. 29 C. 30
29 C. 30 D. 36
= 22​

Dana wants to identify the favorite professional baseball team of people in her community. she stands outside a local sporting goods store and asks every other person who enters, "what is your favorite professional baseball team? " will the results of her survey be valid? explain.