brad measured the length of an object as 2.1×10⁴cm. which items might he have measured? check all that…

brad measured the length of an object as 2.1×10⁴cm. which items might he have measured? check all that apply.\nlength of a city block\nlength of a city park\nheight of a person\ndistance across a city\nheight of an apple tree\nwidth of a screen in a theater\ndepth of water in a swimming pool

brad measured the length of an object as 2.1×10⁴cm. which items might he have measured? check all that apply.\nlength of a city block\nlength of a city park\nheight of a person\ndistance across a city\nheight of an apple tree\nwidth of a screen in a theater\ndepth of water in a swimming pool

Answer

Explanation:

Step1: Convert the measurement to standard units

$2.1\times10^{4}\text{ cm}=2.1\times10^{4}\div100\text{ m}= 210\text{ m}$

Step2: Analyze each option

  • Length of a city - block: A typical city - block can be around 100 - 300 m, so this is possible.
  • Length of a city park: City parks can have lengths in the range of hundreds of meters, so this is possible.
  • Height of a person: A person's height is usually around 1 - 2 m, so this is not possible.
  • Distance across a city: Distances across a city are usually several kilometers, so this is not possible.
  • Height of an apple - tree: Apple - trees are usually 5 - 15 m tall, so this is not possible.
  • Width of a screen in a theater: Theater screens are usually several meters wide, not 210 m, so this is not possible.
  • Depth of water in a swimming pool: Swimming - pool depths are usually 1 - 3 m, so this is not possible.

Answer:

length of a city block, length of a city park