Question

what is the average time for the toy car to move 1.0 m on dirt?
○ 20.2 s
○ 24.4 s
○ 28.1 s
○ 60.7 s
time for toy car to travel 1.0 m on different surfaces

surface	time (s) trial 1	time (s) trial 2	time (s) trial 3
tile	29.1	26.7	28.5
cement	25.5	23.4	24.2

Explanation:

Answer:

To find the average time for the toy car to move 1.0 m on dirt, we use the formula for the mean: \(\text{Average} = \frac{\text{Sum of values}}{\text{Number of values}}\).

For dirt, the times are \(20.0\) s, \(19.2\) s, and \(21.5\) s.

Sum of times: \(20.0 + 19.2 + 21.5 = 60.7\) s.

Number of trials: \(3\).

Average time: \(\frac{60.7}{3} \approx 20.2\) s.

So the answer is \(20.2\) s (corresponding to the first option).