Abicyclist is going 200m/s. after 10 seconds the bicyclist is going 150m/s. what is his acceleration

Acceleration:  rate of change of velocity with time.

Here, that acceleration is:

100 m/s - 150 m/s

     10 sec

= (-150 m/s) / (10 sec) = - 15 meters per second squared

b and c

step-by-step explanation:

answer: a

step-by-step explanation: the answer is a due to the rule of symmetry; that a line of symmetry must divide a figure into 2 pieces that are the exact same, only reflected over a line of symmetry. b and c do not have lines of symmetry and would not divide the figure evenly, thus making the answer a.