No, he should have taken a random sample of all students at the school to get a good sample of the entire population of the school.
Answer:
The missing side is 9cm.
How I got my answer:
1. Squares have equal sides.
2. The area is 81cm^2, so we have to divide 81 by 9.
81 : 9 = 9cm.
Good luck!
Intelligent Muslim,
From Uzbekistan.
Answer: 50%
Step-by-step explanation: 50%
C
Step-by-step explanation:
If the cost is represented by n, why would you subtract the cost of the notebook by 0.78 while multiping it witht the cost?