Integral of (secx*cos(2x))/(sinx+secx)?

Initially 100 milligrams of a radioactive substance was present. after 6 hours the mass had decreased by 4%. if the rate of decay is proportional to the amount of the substance present at time t, find the amount remaining after 24 hours. (round your answer to one decimal place.)

The lines shown below are parallel. if the green line has a slope of -1, what is the slope of the red line?

Find the greatest common factor of the followig monomials 21u^5v,3u^4v^6, and 3u^2v^5