The graph below plots the position versus time for a certain object moving along the x-axis. What is the average velocity over the following time intervals (in m/s)? (Indicate the direction with the signs of your answers.) (a)
0 to 1.00 s
m/s
(b)
0 to 4.00 s
m/s
(c)
1.00 s to 5.00 s
m/s
(d)
0 to 5.00 s

Sanya noticed that the temperature was falling at a steady rate of 1.4 degrees every hour from the time that she first checked her outdoor thermometer. by 6 a.m., the temperature had fallen 21 degrees. which expression can you use to find how many hours earlier she had first checked the thermometer?