Answer:

Step-by-step explanation:

circumference of a circle=2πr
area=πr²
1) we calculate the radius of this circle.
Data:
area=9π m²
area=πr²
9π m²=πr²
r²=9π m² / π
r²=9 m²
r=√(9 m²)=3 m
2) we calculate the circumference:
circumference=2πr=2π(3 m)=6π m
Answer: the circumference is 6π m
Answer:
It will take 280minutes to inspect 196 hard drives
Step-by-step explanation:
If. 28hd=40min
Then. 196hd=x. cross multiply
28hdx=7840hdmin

x=280minutes
Answer:
m = 4
Step-by-step explanation:
The complete question is:
Given:
6.33 x 10
⁹ / 1.79 x 10⁵ ≈ 3 x 
To find:
To best estimate the quotient in scientific notation. what number should replace m?
Solution:
The equation is:
6.33 x 10
⁹ / 1.79 x 10⁵ = 3 x 
Let x = 9 and y = 5 then the above equation becomes:
6.33 x
/ 1.79 x
= 3 x 
Since we know that the exponent property is:
quotient 
Now converting the given equation in the form above we get:
6.33 / 1.79 x
6.33 / 1.79 x 
Now the quotient is 6.33/1.79 ≈ 3.536313
quotient x 
3.536313 x 
Since 9-5 = 4 So
3.536313 x 
3.536 x 
Hence
6.33 x 10
⁹ / 1.79 x 10⁵ ≈ 3.5 x 
Hence m = 4
Answer: 242.54
Step-by-step explanation: your welcome