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.

Find the amount in a continuously compounded account for the given condition. principal: $1000, annual interest rate: 4.8%, time: 2 yr

Ricky takes out a $31,800 student loan to pay his expenses while he is in college. after graduation, he will begin making payments of $190.66 per month for the next 30 years to pay off the loan. how much more will ricky end up paying for the loan than the original value of $31,800? ricky will end up paying $ more than he borrowed to pay off the loan.

Cody was 165cm tall on the first day of school this year, which was 10% taller than he was on the first day of school last year.