A complete the table of value for y=x2-x-2
B
Which of the three curves drawn corresponds to y=x2-x-2
C
Use your graph to find estimates of the solution to the question
x2-x-2=3

i think it is c hope that

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:  

y=35

x=5

step-by-step explanation: