There are four significant figures in the measurement 612.3 meters.
There are 2 significant figures in this measurement.
6, 8 and 0
A measure of a length, given in the Standard SI unit, to 1 decimal place or two significant digits.
The circumference of a circle with radius 6 meters is exactly 12 pi meters. If significant figures are important, the calculated length of 37,699111843077518861551720599354 meters must be rounded up to 40 meters
There are four significant figures in the measurement 612.3 meters.
There are 2 significant figures in this measurement.
Four of them.
There are four significant figures in the measurement 77.09 meters. Each non-zero digit and any zeros between them are considered significant.
The significant figures in 314.721 meters are 6. All non-zero digits are significant, as well as any zeros between non-zero digits.
They have three significant digits
6, 8 and 0
The number of significant figures depends on the the errors of measurement, the uncertainty of reported values, and the significant figures of table values. Ending zeros are only significant if necessary. For example, suppose I want the number of meters in a kilometer to four significant figures. In scientific notation this would be 1.000 * 103. In regular notation, it would be 1000. The period at the end is not for the end of the sentence, but rather to signify that all included digits represent significant digits with regard to accuracy.
In math, a significant figure is a digit that carries meaningful information about the precision of a measurement. It includes all the certain digits plus one uncertain or estimated digit. Significant figures help indicate the accuracy or precision of a number or calculation.
Since the question asks for an approximate value, and not an exact value, we can assume that 18 meters is an approximate measurement, and not an exact value. Thus, we can use the formula for the area of a circle: Area = pi * (radius)^2 and then round off the final answer to the amount of significant digits that we put into the formula, the 2 significant digits of 18 m. We only round off the final answer; we try to use as many digits as possible in the steps in between so that we don't introduce errors. For example, to get the radius of the circle, we halve the diameter, so the radius of the circle is 9 meters. We use the formula now by applying order of operations. First we evaluate the exponent by squaring the radius to get 81 square meters. Then we multiply this by a value of pi that has as many accurate digits as possible. I used a calculator to get 254.46900494077325231547411404564 square meters. This is a ludicrous amount of detail from a measurement of only 2 significant digits. Since we only have 2 significant digits of information, we only know that the first two digits of our answer are accurate: 25_.___.... . This means the true area is between 250 and 260 (all the numbers that start with 25_). We do not have enough information to determine the third digit, but since the next digit in our ideal calculation is 4, then if the true diameter is closer to exactly 18.0 meters, then the true area is closer to 250 than 260, so we report the approximate area as 250 square meters.
A measure of a length, given in the Standard SI unit, to 1 decimal place or two significant digits.
The circumference of a circle with radius 6 meters is exactly 12 pi meters. If significant figures are important, the calculated length of 37,699111843077518861551720599354 meters must be rounded up to 40 meters