Answer:
60
Step-by-step explanation:
8640/60 is 144. 144 is a perfect square. 12*12 is 144
No because that would just be measuring freshman a better sampling method would be surveying the same number of students for each grade
Answer:
x ≤ 6
Step-by-step explanation:
5x - 9 ≤ 21
Step 1. Add 9 to both sides
5x ≤ 30
Step 2. Divide it all by 5
x ≤ 6
Answer:
66,100 in all.
Step-by-step explanation: