Which number is in scientific notation? A. 12.6 * 10^3 B. 3.37 * 1^-1 C. 6.06 * 10^24 D. 0.0000057

 A.  12.6 × 10³

and C. ×

Step-by-step explanation:

Most examples of scientific notation use actual exponents rather than the caret ^  And the × rather than * for times.

B is not correct because it is always  10 to some exponent power

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.