R$7$M$\mathrm{.}3$ Starbase Alpha coasts through deep space at a velocity of $0\mathrm{.}60$ in the $+$x direction with respect to earth. Let the event of the starbase traveling by the earth define the origin event in both frames. Suppose that a t$=8\mathrm{.}0$ h a giant accelerator on earth launches you toward the starbase at $10$ times the speed of light, relative to earth.