Triangle CDE is similar to triangle FGH. Find the measure of side HF. Round your answer to the nearest to E H н 40 F G 21 D 53

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.)

Need on this geometry question. explain how you did it.

What are the solutions of the system? solve by graphing. y = -x^2 -6x - 7 y = 2