Alexa made a short flight in her single-engine plane from airport A to airport B thirty miles away. Alexa arrived and then was put in a holding pattern that required her to fly around the airport before landing. • Lett represent values of the quantity "the time passed in minutes since Alexa left the Airport A • Let s represent values of the quantity "alexa's distance from Airport B, measured in miles" Given the assumption that s is a function of t, give at least one reason why the following trace cannot be the graph of this function. 60 50 40 30 20 10- 10 20 30 40 50

The velocity (in m/s) of an object moving in a straight line by the function of time t (in seconds) where v(t) = 18 where t 2 0. Determine the total distance travelled in the VBt+4 first 4 seconds

The deck of a bridge is suspended 285 feet above a river. If a pebble falls off the side of the bridge, the height, in feet, of the pebble above the water surface after t seconds is given by  y = 285 − 16t2. (a) Find the average velocity (in ft/s) of the pebble for the time period beginning when t = 2 and lasting the following amount of time. (i) 0.1 seconds  (ii)0.05 seconds  (iii)0.01 seconds  (b) Estimate the instantaneous velocity (in ft/s) of the pebble after 2 seconds.

Please help, don't understand!