If a graphic designer is drawing a pattern of four concentric circles on a coordinate plane. The center of the circles is located at (-4, 3). The smallest circle has a radius of 3 units. If the radius of each circle is 4 units greater than the largest circle within it, then the equation of the fourth circle is...

See below.

Step-by-step explanation:

Let's first find the equation of the smallest circle. We know the center is at (-4,3) and the radius is 3 units. Recall the equation for a circle:

Where (h,k) is the center and r is the radius.

Plugging the numbers in, we get:

Each subsequent circle's radius is 4 units greater than the smallest circle. Importantly, note that the center will remain unchanged. The largest circle will have a radius of 3 + 4 + 4 + 4 = 15. We simply need to change the r:

Thus, equation for the fourth circle is:

a

step-by-step explanation:

a

answer: a.   one is a factor of every whole number since every number is divisible by itself.