Negative charge −Q−Q is distributed uniformly around a quarter-circle of radius aa that lies in the first quadrant, with the center of curvature at the origin.

inverse property is the answer

step-by-step explanation:

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

source:  

point form: (-3,-1)

equation form: x=-3 y=-1

step-by-step explanation: