If 66% of an aspirin remains in the bloodstream after 4.0 hours, how long after a 75 mg aspirin is taken does it take for there to be 6 mg in the bloodstream? E> There will be 6 mg in the bloodstream after hours. (Round to the nearest whole number as needed.) Let a1, a2, a3...., an.... be a geometric sequence. Find S10 and 80. 31: 400, r= 0.6 E) 51o=|:| (Type an integer or decimal rounded to two decimal places as needed.) Let a1, 82, 33,..., an.... be an arithmetic sequence. Find an and 823. a1=7,d=3 a13"1 (Simplify your answer.)