Question

always use significant figure rules. remember that these rules apply to all numbers that are measurements. if in 30 minutes allex runs to a store that is 4 km away, what is her average speed in km/h? km/h

Explanation:

Step1: Convert time to hours

30 minutes is $\frac{30}{60} = 0.5$ hours.

Step2: Use speed formula ($v=\frac{d}{t}$)

Distance $d = 4$ km, time $t = 0.5$ h. So speed $v=\frac{4}{0.5}=8$ km/h.

Answer:

8