Isabella knit a total of 12 centimeters of scarf over 3 nights. How many nights will Isabella have to spend knitting in order to knit a total of 16 centimeters of scarf? Assume the
relationship is directly proportional.
nights

4 nights

Step-by-step explanation:

12 centimeters over 3 nights

12 divided by 3 is 4

Each night she knitted 4 centimeters of the scarf

The next night she will knit  more centimeters 12 + 4 = 16

So she would take 4 nights to knit a total of 16 centimeters

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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