The height of an object thrown upward from the floor of a canyon 106 ft deep, with an initial velocity of 120 ft per second, is given by the equation h=-16x^(2)+120x-106, where h represents the height of the object in feet after x second. how long will it take the object to rise to the height of the canyon wall?

You have two photos of a person walking. one shows the person at the corner of third and main streets, the other shows the person at the corner of tenth and main streets. there are lampposts at every corner in this town, and the first picture shows it to be 10: 32: 00 exactly. the second picture shows it to be 10: 49: 30. you know three facts: (1) all of the clocks are synchronized; (2) there are exactly 12 equal-sized blocks per kilometer in this town; and (3) the streets that cross main in this area are numbered consecutively, with no interruptions. what is the person’s average speed in kilometers per hour?