An astronaut on the planet Zircon tosses a rock horizontally with a speed of 7.85 m/s. The rock falls through a vertical distance of 1.40 m and lands a horizontal distance of 9.65 m from the astronaut. What is the acceleration of gravity on Zircon?

Mike - you've been asking a bunch of questions lately. Before proceeding, please show us how far you've gotten in solving this yourself. Have you set up an equation? Just where are you getting stuck? Show us some work on your own, and then we'll be glad to help you out.