Answer is
dm².
In order to calculate the area of the board that can be seen, we need to calculate the area of the the rectangular board and the circular frame. The difference of both's area is the required answer.
Refer to the attachment for step by step solution. :)
Answer:
1. real number, irrational number
2. rational number, real number
Answer:
I'm not 100% sure about these questions but I got
1. 45 students
2. 13.5 students
3. 21 students
4. 2/9=x
Answer:
x5
Step-by-step explanation: