Question

• always use significant figure rules. remember that these rules apply to all numbers that are measurements. calculate the distance in km that allex can run in 2.0 hours if she maintains the constant average speed of 8.0 km/h. ○ 1.6 km ○ 16 km ○ 4 km

Explanation:

Step1: Recall the distance formula

The formula for distance \( d \) is \( d = v \times t \), where \( v \) is speed and \( t \) is time.

Step2: Substitute the given values

Given \( v = 8.0 \, \text{km/h} \) and \( t = 2.0 \, \text{hours} \), substitute into the formula:
\( d = 8.0 \, \text{km/h} \times 2.0 \, \text{h} \)

Step3: Calculate the product

\( 8.0 \times 2.0 = 16 \) (using significant figure rules: both 8.0 and 2.0 have 2 significant figures, so the result should have 2 significant figures, and \( 8.0 \times 2.0 = 16 \) which is consistent with 2 significant figures).

Answer:

16 km