The van der pol equation: z',-μ (1-x^2) 2' + x = 0 with x(0) = 0, x'(0) = 1 has been used in models from biology, circuits, and seismology. write this equation as a system of two first order odes. include the initial conditions for the system.

The graph and table shows the relationship between y, the number of words jean has typed for her essay and x, the number of minutes she has been typing on the computer. according to the line of best fit, about how many words will jean have typed when she completes 60 minutes of typing? 2,500 2,750 3,000 3,250