- True or false, Natural birth or natural selection?

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Ax - by + bx - ay? Can someone please explain how i differentiate e^(x) * (f(x))^2 with respect to x? Is HCN or H3O+ a stronger acid? A sample of nitrogen gas has a volume of 1.50 L at STP. What is the temperature in degree C if the volume is 8.00 L at 2.00 ATM? A scientist has 100 milligrams of a radioactive element... (picture below)?