Juan biked 17 miles in 27 hours. Find his biking rate in miles per hour
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title
Plot the point (7,3) below
12
10
5
4
2
2
4
10 12
X-Axis

1k

step-by-step explanation:

-6k+7k

(-6+7)k

1k

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:  

it would be 4 over -2 divided by -1 over 3.

if you want a solution it would be 4

you flip it so it would be 4/-2 divided by 3/-1 then it would be 12/3 and you would simplify it to 4