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Mkey [24]
3 years ago
7

Which expression is equal to 21,340?

Mathematics
2 answers:
Olenka [21]3 years ago
6 0
2.134 x 10^4 is equal to 21,340
Zielflug [23.3K]3 years ago
4 0

<u>Answer:</u>

2.1340 x 10^-4

<u>Step-by-step explanation:</u>

The numerical value 21,340 can be expressed in the form of a scientific notation.

To convert a number into scientific notation, we need to move the decimal place to the right side from the first number of the value from its left side.

Here in this case, we will put a decimal to the right side of 2 and then the rest of the values will come after the decimal.

Count the number of values and write it as the negative power of the number.

Therefore, 21,340 can be expressed as 2.1340 x 10^-4.

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The equilateral triangles shown below are similar.
Drupady [299]

Answer:

Below in bold.

Step-by-step explanation:

The smaller one has side 2 and the corresponding side on the larger one is 5, so the answer is 2/5.

The  individual sides and perimeter are one-dimensional, so:

The ratio of their perimeters is the same 2/5.

The ratio of their areas ( which is 2 dimensional) is 2^2/5^2 = 4/25.

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2 years ago
Which of the following rigid motions is used to prove that vertical angle pairs are congruent? (1) a rotation by 90 about the i
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Answer:

(2) a rotation by 180^{0} about the intersection of the lines creating the vertical angles.

Step-by-step explanation:

Rigid motion are a set of transformation procedure to change the dimension, orientation or size of a given figure or shape. It involves rotation, translation, reflection and dilation.

Vertical angles are formed when two straight lines intersect to form angles. But two opposite angles called vertical angles are equal. To prove that vertical angles are equal; a rotation by 180^{0} about the intersection of the lines creating the vertical angles is required.

3 0
3 years ago
8 cubed in standard form and exponential form
masya89 [10]

Answer:

  • so 8 cubed (8 × 8 × 8) in standard form is:  512
  • so 8 cubed (8 × 8 × 8) in exponential form is: 8³

Step-by-step explanation:

As we know that

The cube of any given number is that number times itself.

For example, 8 cubed, denoted by 8³ is equal to 8 × 8 × 8.

An exponent basically indicates the number of times we must multiply the base number. For example, to compute 8³, we multiply 3 three times (8×8×8).

  • so 8 cubed (8 × 8 × 8) in standard form is:  512
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8 0
3 years ago
If 2a-8=4 and 3b-8=10, what is the value of a+b?
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A=6
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3 0
3 years ago
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Blababa [14]

Answer:

460 m

Step-by-step explanation:

Boundary = perimeter

Perimeter = 2(length + width)

= 2(150 + 80)

= 2(230)

= 460 m

7 0
2 years ago
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