A radioactive substance decays according to A = A0e-0.003t, where Ao is the initial amount and is the time in years. If Ao = 650 grams, find the time for the radioactive substance to decay to 384 grams. Round your answer to two decimal places, if necessary.

Amira is painting a rectangular banner 2 1/4 yards wide. the banner will have a blue background. amira has enough paint to cover 1 1/2 square yards of the wall. the school colors are blue and yellow, so amira wants to add yellow rectangles on the left and right sides of the blue rectangle. the yellow rectangles will each be 3/4 yards wide and the same height as the blue rectangle. what will be the total area of the two yellow rectangles?