What is the check digit (d) for the visa card number 4364 2813 7205 018d?

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?

Express the following as a function of a single angle. cos(60) cos(-20) - sin(60) sin(-20)

The surface area of the triangular prism is .