Help this is 8th grade science btw

  (a)  0.8 m/s

Explanation:

The distance traveled was 40 m away from the reference point, and 40 m back to the reference point, for a total of 80 m. The total time take was 100 s, so the average speed was ...

  speed = distance/time = 80 m/(100 s) = 0.80 m/s

think about the oscillation of the toy shown in the video. when the toy is at the highest point of its motion, its velocity is zero and its acceleration is negative.

b

step-by-step explanation: a third of 24 is 8, 8 times 3 is 24 so 8 - 2 would be 6