Which of the following has four significant figures?

Express 1000 with one significant figure.

A solar panel is 55.3 m long and 25 m wide. To estimate the area for installation purposes, what's the area rounded to the appropriate number of significant figures?

Read the following statements and Identify the correct statement/s. A: A choice of change of different units change the number of significant digits. B: To remove ambiguities in determining the number of significant figures, the best way is to report the measurement in scientific notation. C: Solid angle made by a hemisphere at its centre is $2\pi$ steradian.

The radius of a wire is 0.24 mm. Then its area of cross section by taking significant figures into consideration is

The radius of a wire is 0.24 mm. Then its area of cross section by taking significant figures into consideration is

A rectangular swimming pool has a length of 55.3 m and a width of 25 m. What is the area of the pool, rounded to the correct number of significant figures?

The sides of a rectangle are 6.01 m and 12m. taking the significant figures into account, the area of the rectangle is

The number of significant figures in all the given numbers 25.12, 2009, 4.156 and $1.217 imes {10^{ - 4}}$ is

A student performs an experiment and obtains a value of $g = 9.7542 m/s^2$. The standard value is $g = 9.8 m/s^2$. Which of the following represents the student's result with the correct number of significant figures, considering the precision of the standard value?

A student performs an experiment to determine the density of a rectangular block. They measure the length as $12.12 ext{ cm}$, the width as $5.3 ext{ cm}$, and the height as $1.21 ext{ cm}$. The mass is measured as $50.2 ext{ g}$. The student calculates the volume and then the density. Which of the following correctly expresses the final calculated density with the appropriate number of significant figures?