Which of the following best forms the figure shown? 2 line segments that meet at an endpoint » 2 lines that meet at an endpoint 2 rays that meet at an endpoint 2 angles that meet at an endpoint

f(x) has value 150 at x= 0

and 0 at x= 3

so d(f(x))/dt = slope = -150/3 = -50

answer: the answer is   graph (a)

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:  

the first domain and range set to the left is matched with the top relation, and the second set the set in the middle goes with the bottom relation.