Discover Questions

Reverse the order of integration and then evaluate the integral. ∫ (0 to 125) ∫ (3 to 5) 1/y^4+1 dy dx? Please help? Ok so how exactly do scientists measure the density and mass of a black hole? Is barium cyanide basic, acidic or neutral when dissolved in water? What is the density of nitrogen at 0 degrees C and 742 mmHg? What is the pressure in atm of 0.742 mole of gas at 10.91 L and 291 K?