Find the distance between 5 and 4i ?

Distance between 5 and 4i is:

6.40

Step-by-step explanation:

The distance(d) between the points a+ib and c+id is calculated by

Here a=5,b=0 and c=0,d=4

Hence, d=6.40

Hence, distance between 5 and 4i is:

6.40

the circle graph is not a function.

step-by-step explanation:

the graph of the circle is not a function.

because for a graph to be a function, each value of x must give one value of y

in the circle, the values of x for -2< x< 2 each give 2 values of y.

hence this is not a function.

can you add an image ?

step-by-step explanation: