Question

select the best estimate for the measure of the area of a basketball court. choose the correct answer below. 420 km² 420 cm² 420 m²

Explanation:

Step1: Analyze the units

$1\ km = 1000\ m$, so $1\ km^{2}=(1000\times1000)\ m^{2}= 1000000\ m^{2}$. A value of $420\ km^{2}$ is extremely large for a basketball - court.

Step2: Analyze the units

$1\ m = 100\ cm$, so $1\ cm^{2}=\frac{1}{10000}\ m^{2}$. A value of $420\ cm^{2}$ is extremely small for a basketball - court.

Step3: Consider the real - life size

A standard basketball court has a reasonable area measured in square meters. A size of around $420\ m^{2}$ is appropriate for a basketball court.

Answer:

$420\ m^{2}$