Ken's predicted temperature for april is 7ºc. his prediction for may is 2ºc higher than april. he used the number line to solve the problem, starting at 0, moving right to 7, and then moving 2 units to the left. explain ken's error.

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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