[填空题]
In coming to a stop, 8xnp +a5my h 4u3i1qrva cy-j2d+ ky kj r nxy2p7d-z8qbn()cm.zar leaves skid marks 92 m long on the highway. Assuming a deceleration 2n .8krp kyndc y2z z-x(yqbjm)7j d-+of $7.00 \; m/s^2$, estimate the speed of the car just before braking. $m/s$
