Question

7. State the number of significant figures in 4000 m.​

Answer 1

Answer:

4

Explanation:

400m all zero to the right side of the last non zero digit are knows degree terminate or federal zero in the number without decimal number are not significance

Answer 2

Answer:

The number 4,000 should be written as $4\times 10^4$ since it contains one important figure.
In scientific notation, the number 450, which has two significant figures, would be represented as $4.5\times 10^2$, whereas the number 450.0, which has four significant numbers, would be written as $4.500 \times 10^2$.

Explanation:

Following are the guidelines for determining which digits in a measurement are significant:

• All numerals that are not zero have meaning. All of the digits in 1,357 mm are meaningful.

• Significant zeros are those that are sandwiched (or embedded) between significant numbers. 405 g has three significant figures as a result.

• Leading zeros, or zeros at the start of decimal numbers smaller than 1, are unimportant. The first four numbers of 0.000458 mL are leading zeros and are thus meaningless. The only purpose of the zeros is to place the numbers 4, 5, and 8 in the appropriate decimal locations. There are three key figures in this number.

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