Find the area of a circle that has a radius of 9 mm. Use 3.14 for π.

254 cm squared

Step-by-step explanation: The area of a circle is given by formula: πr squared

The area is 3.14 x (9) squared cm squared

9 squared =81

3.14 x 81 = 254. 34 cm squared

Round it to 254 and that's your answer

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.

step-by-step explanation:

why? because i noticed a pattern. 60 120. those numbers without the zero, make the 6 times tables leaving your answer to be b since 6 times 4 is 24 and adding a zero making it 240.