Answer:
A. Length of a Tour Bus ↔ #2. 1.1 × 10¹ meters
B. Width of an apple ↔ #3. 4 × 10⁰ centimeters
C. Distance from Earth to a Satellite ↔ #6. 8 × 10² kilometers
D. Thickness of a human hair ↔ #5. 9 × 10¹ micrometers
Explanation:
A. Length of a tour bus.
The length of a tour bus should be measured in meters. It sure is way less than 1 kilometer and way more than a few centimeters. It could be about some meters, more than 5 meters, may be between 10 meters and 15 meters.
The measurement in the box # 2. is 1.1 × 10¹ meters, which is equivalent to 1.1 × 10meters = 11 meters. Thus, this is a reasonable length.
B. Width of an apple.
The most appropiate unit to measure the width of an apple should be centimer. It certanly is shorter than 1 meter and bigger than 1 mm.
The width of an apple could be, more or less, around 8 centimeters. The only measurement in the boxes that is in that order is that in the box #3., 4 × 10⁰ centimeters, because 10⁰ = 1, so 4 × 10⁰ = 4 × 1 = 4centimeters.
C. Distance from Earth to a Satellite
The distance from Earth to a satellite should be measured in kilometers.
You can find in the internet that the distances of the satellites are between 700 kilometers and 36,000 kilometers.
The number in the box #1 is too big, in the order of ten trillions of kilometers, because one trillion is 10¹²; thus that is notreasonalbe (too big).
The number in the box #6 is 8 × 10² kilometers, which is equal to 8 × 100 = 800 kilometers.
Thus, 8 × 10² kilometers (box #6) is the most reasonable measurement for the distance from Earth to a Satellite
D. Thickness of a human hair
Of course, kilometers, meters, centimeters and even milimeters are units too big to measure the thickness of a human hair.
One micrometer is 10⁻⁶ meters or 10⁻³ milimeters.
In the internet you can find that diameter of the humar hairis in the range from 17 micrometers to 181 micrometers.
The measurement in the box #5. is 9 × 10¹ micrometers, which is equivalent to 9 × 10 = 90 micrometers.
Thus, 9 × 10¹ micrometers is the most reasonable measurement fot the thickness of a human hair.
