Someone asap! ! find the vaule of x. round to the nearest tenth. enter number that belongs in the green !

Step-by-step explanation:

Use sine:

We have a measure of the angle and length of the hypotenuse:

Therefore we have the equation:

     multiply both sides by 47

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: