Can anybody helppp meee please Solve the area formula for a circle, A = πr2, for r2.

r2 = Aπ

r2 = A – π

Evaluate the expression for the given value of the variable 2×(c2-5) for c=4

Idon’t understand! use slope intercept form to solve: through: (2,5) slope= undefined

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