Answer:
5
Step-by-step explanation:
The radius is a distance on a circle from the center to a point on the circle.
We have both of these points describe here in this definition.  Using the distance formula will give us the radius.

The difference between 1 and -3 is 1-(-3)=4.
The difference between 5 and 2 is 5-2=3.




 
        
             
        
        
        
Answer:
Option 2. 
Step-by-step explanation:
X is a number greater than the equality. Therefore the arrow will go to the bigger side. It also is not equal to the equality hence the cirle is open. 
 
        
                    
             
        
        
        
Answer:
It is the second answer
Step-by-step explanation:
The standard form of an ellipse is 
x^2/a^2 + y^2/b^2  or x^2/b^2 + y^2/a^2 = 1
If the x is the main axis we use the first form.  If the y is the main axis we use the second form.  We will use the second form.
our a is 3 and our b is 4
x^2/3^2 + y^2/4^2
 
        
             
        
        
        
First of all we have to arrange the data in ascending order as shown below:
28, 40, 43, 43, 45, 50, 50
Total number of values = 7
Since the number of values is odd, the median will be the middle value i.e. 4th value which is 43. Median divides the data in two halves:
1st Half = 28, 40, 43
2nd Half = 45, 50, 50
Q1 or the First Quartile is the middle value of the lower or 1st half which is 40.
Q3 or the Third Quartile is the middle value of the upper or second half, which is 50.
IQR or the Inter Quartile Range is the difference of Q3 and Q1. 
So, IQR= Q3 – Q1 = 50 – 40 = 10
Thus, IQR for the given data is 10