Show all work to multiply (6+√-64)(3-√-16)

Step-by-step explanation:

6 ( 3 - √-16) + √-64 ( 3- √-16)

18 - 6(-4)^2*1/2 + 3 × (-8)^2*1/2 - √1024

18 - 6 (-4) + 3× (-8) - 32

18 + 24 - 24 - 32

18 - 32

-14

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: