9. there are 22 signs
10. 34.46 square miles
11. 77.9 miles
:)
Answer:
The answer to the first one is 13,600
The area of the second one is 137.5
Step-by-step explanation:
Probability
There are:
5 anthropology students
3 sociology students
4 psychology students
5 + 3 + 4 = 12 students in total
The probability that one randomly selected student is for anthropology is:

Note we have divided the number of favorable cases by the total cases