Question 4*+Before doing a ode introduction calculation, what setup information should be written down?
Question 7**+A drink temperature T changes with time t according to dT/dt equals negative k times T minus room temperature T_s. Decide whether this is an ODE.
Question 8**+A displacement x(t) satisfies m x double prime plus c x prime plus kx equals zero. Identify the unknown function and the independent variable.
Question 13****Correct this mistake in ODE Introduction: Treating every differential equation as ordinary.