A 3cm×10cm rectangle sits inside a circle with radius of 12 cm

422.39

Step-by-step explanation:

The shaded area is the area of circle minus the area of the rectangle.

So, area of circle is = = 144 = 452.3893

area of rectangle is L x W = 10 x 3 = 30

So, the shaded area is 452.3893 - 30 = 422.3893

you would have to sell 24 bracelets.

step-by-step explanation:

84/3.5 = 24

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.