The distance formula is:
d = √[(x2 - x1)^2 + (y2 - y1)^2]
To use it, you need to have two points on a line that will look like this:
(x1, y1) and (x2 , y2)
Then you just plug it in, and you get your answer.
Answer: Wouldn't the answer be 5 because 4 plus 5 is 9?
Step-by-step explanation:
Answer:

Step-by-step explanation:
The area of a circle varies directly as the square of its radius.

If r₁ = 2in, A₁ = 12.568 in₂, r₂ = 6.4 in, A₂ = ?
ATQ,

So, the new area of the circle is
.