Samantha's car used 3 gallons to travel 51 miles. At what rate does the car use gas, in miles per gallon? On the double number line below, fill in the given values, then use multiplication or division to find the missing value.

3x + 4y -25 =0 represents the amount of change sianna should recieve

at least two

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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