A 10-m ladder is leaning against a wall. The top of the ladder rests against the wall 9.3 m above the ground. What angle does the base
of the ladder make with the ground?

im guessing (23,14). hope this : )

really your just stupid if you don't know this

step-by-step explanation:

its kinda hard to answer this when we dont have all the information that we need.

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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