The center of the circle is at (1, 3) and the radius is 4. what is the equation of the circle in standard form?

(x - 1)^2 + (y - 3)^2 = 4^2

Step-by-step explanation:

The generic equation of a circle in standard form is:

(x - h)^2 + (y - k)^2 = r^2, where the center is (h, k) and the radius is r.

Taking the given info, we then have:

(x - 1)^2 + (y - 3)^2 = 4^2

it should be a.

hope it

ending amount = beginning amount / (2^n)

where "n" = number of half-lives (or elapsed time / half-life)

ending amount = 50 mg / (2 ^10 / 5.3)

ending amount = 50 mg / (2 ^ 1.8867924528)

ending amount = 50 m / 3.6981210597

ending amount = 13.5203794557 mg

or about 13.5 mg remain

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