If the half-life of a drug in the bloodstream is 15 hours, how much drug is left in the bloodstream after 2 days when
the initial dose was 400 milligrams? [Round your answer to the nearest tenth.]
435 milligrams

Sam claims that cos x =sin y if x and y are congruent angels. is sam correct ?

Which sum or difference identity would you use to verify that cos (180° - q) = -cos q? a.) sin (a -b) = sin a cos b – cos a sin b b.) cos (a -b) = cos a cos b – sin a sin b c.) cos (a -b) = cos a cosb + sin a sin b d.) sin (a + b) = sin a cos b + cos a sin b

In the diagram, be and ad pass throughthe center of circle o, and the area ofsector aoc is 47.45 square units. what isthe area of sector boc? use the value =3.14, and round your answer to two decimalplaces.22.33 square units25.12 square units