Help please due at 4:00

The volume of a sphere is increased by 6%. calculate the corresponding percentage increased in it area.

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

Alex's monthly take home pay is $2,500. what is the maximum bad debt payment he can maintain without being in credit overload?