Your solution produces two roots but you should make sure that both times are valid. Check your work by logging each root back into the orginal equation and simplifying each expression
Identity the answer that is actually a solution (points: 1 point for each time)

T=sqrt( (8t+24)/(16) )
T=sqrt(2)

dont know

step-by-step explanation:

he earned 78.75 in interest.

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

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