The area of a circle is represented by the equation A=πr2, where r is the radius. The area is 64π m2. What is the length of the diameter?

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.)

How many real and imaginary solutions does the equation x^2-3x=-2x-7 have?

5x−4≥12 or 12x+5≤−4 can you with this problem