- What are two characteristics of electromagnetic waves de we use to classify them?

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Problem involving math induction! 1. Prove for every integer p, p^2 + 3p + 8 is even.? Find all solutions to the following system of nonlinear equations.
(x − 2)^2 + y ^2 = 20
(x + 2)^2 + y^ 2 = 20? Solve the equation for x.
e^x = 85? How to locate/take pictures of planets? Describe how and where new crust material is made. Describe how and where old crust is destroyed.?