1st to answer brainliest must be correct which equation describes the nth term of the arithmetic sequence 7, 10, 13, 16, . .? show your work a. an= 3n + 4 b. an= 7 + 3n c. an= –4n + 3 d. an= 3n – 4

Step-by-step explanation:

(2005, 12,000)        (2005, 12,000)

   x1          y1                x2           y2

m= (12,250-1200) /  (2010-2005) = 250/5 = 50/1 = or 50

what is the rest of the question? ?

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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