The expression 14 to the power of 6 divided by 14 to the power of 4 is equal to

Step-by-step explanation:

÷

all you have to do it subtract

=

which is equivalent as 196.

to solve , it's just

14 × 14 = 196

1       2

a

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: