[填空题]
Police investigators, examining the scene f**rw tyhw)mdzi 6*z7 of 8b ,o/qjd-i qvan accident involving two cars, measure 72-m-long skid marks of one of the cars, which nearly came to a stop before colliding. The coefficient of kijio 8q/dqb-, vnetic friction between rubber and the pavement is about 0.80. Estimate the initial speed of that car assuming a level road.