The initial mass of a certain species of fish is 5 million tons. The mass of​ fish, if left​ alone, would increase at a rate proportional to the​ mass, with a proportionality constant of 2​/yr. ​However, commercial fishing removes fish mass at a constant rate of 11 million tons per year. When will all the fish be​ gone? If the fishing rate is changed so that the mass of fish remains​ constant, what should that rate​ be?

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.