the area of a forest has been decreasing at a rate of 14% each year. The forest has a total area of 38.6 square miles. 3a.)Write an exponential decay model to find for any given number of years. 3b.)how many years would it take for the forest to be around 21 square miles in area? 3c.) If this continues, what will be the area in 15 years?

The radical equation 2+√2x-3 = √x+7 has a solution set [x= a0} and an extraneous root x = a1.

Which is the equation of an ellipse with directrices at x = ±4 and foci at (2, 0) and (−2, 0)?

Suppose that 3% of all athletes are using the endurance-enhancing hormone epo (you should be able to simply compute the percentage of all athletes that are not using epo). for our purposes, a “positive” test result is one that indicates presence of epo in an athlete’s bloodstream. the probability of a positive result, given the presence of epo is .99. the probability of a negative result, when epo is not present, is .90. what is the probability that a randomly selected athlete tests positive for epo? 0.0297