Tim has contributed to social security over 30 years but has no other retirement plan. at age 50, should he start an ira instead of just relying on social security?

Which is the equation of an ellipse with directrices at x = ±4 and foci at (2, 0) and (−2, 0)?

Astuntman jumping off a 20-m-high building is modeled by the equation h=20-5t^2, where t is the same in seconds. a high-speed camera is ready to film him between 15m and 10m above the ground. for which interval of time should the camera film him?

You deposit $5000 each year into an account earning 3% interest compounded annually. how much will you have in the account in 30 years?