the north american x - 15 rocket - powered aircraft is the worlds fastest manned plane on record. it travels…

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. about how much faster is the plane?

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. about how much faster is the plane?

Answer

Explanation:

Step1: Write out the speeds

Plane speed: $7\times10^{3}$ km/h, bird speed: $3\times 10^{2}$ km/h.

Step2: Make the exponents the same

$3\times 10^{2}=0.3\times 10^{3}$.

Step3: Subtract the speeds

$(7 - 0.3)\times10^{3}=6.7\times 10^{3}$ km/h.

Answer:

$6.7\times 10^{3}$ km/h