Please help! My teacher never taught us this.

12π

Step-by-step explanation:

So our first step is to find the circumference of the circle.

Circumference is πd.

The diameter is double the radius, and the radius is 8.

Therefore, the diameter is 16 (8*2)

The circumference would then be 16π.

Arc YPX is 3/4 of the circle. This is because a circle has 360 degrees, and arc XY is 90 degrees. Arc YPX is the rest of the circle. (360-90=270, 270/360=3/4)

So, 3/4*16π=12π

Arc YPX is 12π

hi how are you doing today? if you ever need just tell me

step-by-step explanation:

center (1,3) with radius 6

step-by-step explanation:

we must complete the square to find the center and radius of the circle.

first make sure the x and y squared terms have 1 as their coefficients. we also make sure x and y terms together.

we now create space between the x and y terms with parenthesis.

we complete the square by taking the middle terms -2x and the -6y - divide each and square them.

we add the squares to both sides.

simplify.

and write the quadratics in factored form.

the center is (h,k) or (1,3). the radius is the square root of 36 which is 6.