Which expression is equivalent to 45m^-6 p^2 v^12/ 15m^-2 p^8 v^-4for all values of m , p , and v where the expression is defined?

yes   because as the functions are graphed they eventually will intersect unless otherwise

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:  

the answer is 15.50 for one mile

b) is slope: 0   y- intercept 15.5