Question

always use significant figure rules. remember that these rules apply to all numbers that are measurements. calculate the average speed of a gazelle that runs 140 meters in 5.0 seconds. m/s 28 56 0

Explanation:

Step1: Recall the formula for average speed

The formula for average speed \( v \) is \( v=\frac{d}{t} \), where \( d \) is distance and \( t \) is time.

Step2: Substitute the given values

Here, \( d = 140 \) meters and \( t = 5.0 \) seconds. So we calculate \( v=\frac{140}{5.0} \).

Step3: Perform the division and apply significant figures

\( \frac{140}{5.0}=28 \). Now, check significant figures: 140 has two significant figures (the trailing zero might be ambiguous, but 5.0 has two, so the result should have two significant figures. 28 has two significant figures, so it's valid.

Answer:

28