Lin drew a triangle and a dilation of the triangle with scale factor
1. What is the center of the dilation? Explain how you know.
2. Which triangle is the original and which triangle is the dilation? Explain how you know.

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:  

time is equal to distance over rate so

t = d/r

need a little bit more information for the second question.

answer is c

step-by-step explanation: