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It is 4 cm!

Q: What is the length of the four cm reported nail to the correct number of significant figures?

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There are 6 significant figures in this length.

You have a right angle triangle so use Pythagoras' theorem to find the length of the other side (the hypotenuse) 242+242 = 1152. The square root of 1152 = 33.9411255 inches. So your answer is 34 inches correct to two significant figures.

Use Pythagoras: 82+92 = 145 and the square root of 145 is about 12.04159456 length of hypotenuse = 12 units to 2 significant figures

All solid figures have length, width and height and, conversely, if a figure has length, width and height then it is a solid figure.

If its for a rectangle, multiply length x width. Other figures have different formulae.If its for a rectangle, multiply length x width. Other figures have different formulae.If its for a rectangle, multiply length x width. Other figures have different formulae.If its for a rectangle, multiply length x width. Other figures have different formulae.

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There are 6 significant figures in this length.

0.48 has 2 significant figures and 0.4800 has 4 significant figures. The correct answer would depend on the device used to measure the string, and on the precision of that instrument.

893.7cm to three significant figures is 894cm

I believe you mean significant figures. Take an example. If you measure the length of a table as 1.52 m and its width as 1.46 m, each is measured to the nearest cm, and the values have just 3 significant figures. So the area of the table could be calculated as 1.52 x 1.46 = 2.2192 m2. But as the length could actually be between 1.515 and 1.525m, and similarly for the width, the area of the table could be between 1.515 x 1.455 = 2.2043 m2 and 1.525 x 1.465 = 2.2341 m2. So the answer should be given to 3 significant figures (2.22 m2) as the 4th and 5th figures are not significant. As a general rule, in multiplication and division the number of significant figures given in your answer should be no more than the smallest number of significant figures found in any of the numbers used to do the multiplication (or division). 4.5 x 4.653 x 3.234 = 67.715109 = 68 to 2 sig.figs.

You would need to record to the 0.1 cm, then estimate the next significant figure. So you should have a measurement to the 0.01 cm.

You have a right angle triangle so use Pythagoras' theorem to find the length of the other side (the hypotenuse) 242+242 = 1152. The square root of 1152 = 33.9411255 inches. So your answer is 34 inches correct to two significant figures.

Use Pythagoras: 82+92 = 145 and the square root of 145 is about 12.04159456 length of hypotenuse = 12 units to 2 significant figures

Assuming a year length of 365 days, and rounded to three significant figures, there are 23.4/365 = 0.0641 years in 23.4 days.

All solid figures have length, width and height and, conversely, if a figure has length, width and height then it is a solid figure.

It depends on the precision of your ruler. It's usually recommended that you guess one digit after the precision of your ruler. So if you have a meter stick with millimeters as the smallest measurement, try to guess to 10ths of a millimeter. The number of significant figures depends on the size of your measurement. If it is less than 1 millimeter, you would only have one significant figure. For every order of magnitude greater, you would have one more significant figure.

If its for a rectangle, multiply length x width. Other figures have different formulae.If its for a rectangle, multiply length x width. Other figures have different formulae.If its for a rectangle, multiply length x width. Other figures have different formulae.If its for a rectangle, multiply length x width. Other figures have different formulae.

3.54m