Question

the north american x - 15 rocket - powered aircraft is the worlds fastest manned plane on record. it travels about 7×10³ kilometers per hour. the duck hawk is the worlds fastest bird, traveling at speeds over 3×10² kilometers per hour. which flies faster, the plane or the bird?

Explanation:

Step1: Expand the scientific - notation values

$7\times10^{3}=7\times1000 = 7000$ and $3\times10^{2}=3\times100 = 300$

Step2: Compare the two values

Since $7000>300$

Answer:

The plane flies faster.