The table shows Ryan's total skiing distance at different time intervals during his cross-country ski outing. What was the average rate of change between Hour 2 and Hour 8?

Use a table to calculate the average rate of change over a specified interval.

can you rephrase the question ? it is unclear : -)

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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