Question

Brad measured the length of an object as 2.1 * 10^4 cm. Which items might he have measured? Check all that apply.

Answer 1

Answer:

1. length of a city block

2. length of a city park

Step-by-step explanation:

You first have to make the conversion from scientific notation to regular numbers, the length of that object would be 2.1x 10,000= 21,000, so 21,000 centimeters are only 210 meters, that is too long to be height of a person, or an apple tree, the screen in a theater or the depth of water in a swimming pool, and is way too short to be the length across a city, so the only options would be length of a cuty block, and length of a city park.

Answer 2

Answer with explanation:

Length of an object

                           $=2.1\times 10^4\\\\=2.1 \times 10000\\\\=21,000$cm

Other unit of measurement are Meter and Kilometer.

→1 Meter = 100 cm

→1 Kilometer= 1,000 meter=100,000 cm

→→21,000 cm = 210 meter = 0.21 Km

Option B:→ length of a city park, is most suitable measurement ,among all other measurement ,that Brad has done.

Second option Might be: Option A→ Length of a city block , may be That Brad has measured.

All other options are Inappropriate, as they require smaller scale or may be larger Scale ,that brad has used to measure

1.≡ Height of a person →→→240 cm (Maximum of 8 feet)

2.  ≡Distance across a city  →→→1 Km or 2 Km or 3 Km...

3.  ≡Height of an apple tree→→→1,000 cm (Maximum)  

4. ≡Width of a screen in a theater→→→2,100 cm (Maximum)

5 ≡depth of water in a swimming pool→→→225 cm

None of the five things described above appears, that brad has measured.