The Do-Gooders decide to have a fundraiser featuring local bands. In order to make money for the fundraiser, they charge $25 per person. They know there will be some expenses, but for now they would like to see how much money they could potentially make from selling tickets to the concert.

step-by-step explanation:

i need to answer questions so i dont know but i think its the first one because it goes up but a consent rate

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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