It is a linear measurement.
The measurement of 12 feet up is a scalar measurement. Scalars have magnitude but no direction. In this case, the magnitude is 12 feet, indicating the distance or height, but there is no direction specified.
A vector has magnitude and direction, so since it is up it is vector.
A scalar has distance but no direction. A vector has distance and direction. "12 feet up" has distance (12 feet) and direction (up), so is a vector.
You've set up the exact question yourself, multiply 30 by 40. Square feet implies that you have multiplied a foot measurement by a foot measurement, so that should clue you in as to what to do. The answer is 1200.
Precision is affected by how great an error can be when a measurement is taken. A measurement in feet has a greater resolution than one in yards. 3 times the resolution in fact. However, a measurement of 51 feet that can be up to 15% out is not as precise as a measurement of 58 yards with a 1% possible error.
They are both as precise as the measuring tools. Precision is affected by the error introduced by the measurement or in a dimension, often known as the tolerance.A measurement in inches has a greater resolution than one in feet. 12 times the resolution in fact. However, a measurement of 178 inches that can be up to 15% out is not as precise as a measurement of 12 feet with a 1% possible error.
12 feet up has both a magnitude (12 feet) and a direction (up), making it a vector. This would likely be used for the displacement of some object.
192, type it into google. type 3 yards 7 feet to inches, and 192 comes up
146.1 centimeters is equal to 4.793307 feet. To find a measurement conversion, go to ask.com and type in "centimeters to feet" (without quotation marks) or whatever you want to convert. A box will show up for you to type the exact number in that you want converted.
19.81200 meters (you can type it up on google ^-^)
You can't convert a pure number - a number without a measurement - to a measurement. It just doesn't make sense. You can convert one measurement to another measurement, if both measurements are of the same type (for example, a length to a length).
You can divide the number of inches by 12, (the number of inches in a foot) to come up with a board length measurement.