Evaluate the expression using the values m = 7, r = 8, and t = 2.
3m - 5t

Sketch one cycle if the cosine function y=2cos2theta

Use the second shift theorem to find the inverse laplace transform of (e^−3s) / (s^2 + 2s − 3)

Dana wants to identify the favorite professional baseball team of people in her community. she stands outside a local sporting goods store and asks every other person who enters, "what is your favorite professional baseball team? " will the results of her survey be valid? explain.