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what refers to the quantity of goods and services that consumers are willing to buy at a given price?
refers to the quantity of goods and services that consumers are willing to buy at a given price.
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step-by-step explanation:

circumference divided by 3.141592654 then timesthe radius twice

15.36 per mile

but forgot to round

i am pretty sure

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: