A length of two units!
inches, centimeters and millimeters
An English ruler typically has measurements marked in inches and fractions of an inch. The main numbers represent whole inches, while smaller marks indicate fractions such as 1/2, 1/4, 1/8, and 1/16 of an inch. Some rulers may also include centimeters alongside inches for metric measurements. The total length of the ruler is usually 12 inches or 30 centimeters.
a little over 6 1/8 inches, unless it's a 10ths ruler it may mot have a mark to indicate tenths
Probably centimetres.
When writing a range of numbers, square brackets are used to indicate the end number is included and round brackets are used to indicate the end number is excluded.examples:[1, 4] = all numbers ≥ 1 and ≤ 4(1, 4] = all numbers > 1 and ≤ 4[1, 4) = all numbers ≥ 1 and < 4(1, 4) = all numbers > 1 and < 4
To read a hundreds ruler, first identify the scale marked with numbers from 0 to 100, which represents centimeters (or millimeters, depending on the ruler). Each increment between the numbers typically represents one centimeter. For more precise measurements, look for the smaller divisions between the centimeter marks, which usually indicate millimeters. To measure, align the object with the ruler's edge, and read the value at the point where the object ends.
pH numbers below 7 indicate an acid, with lower numbers indicating stronger acids. pH numbers above 7 indicate a base, with higher numbers indicating stronger bases.
2'1" on a ruler represents a measurement of 2 feet and 1 inch. Rulers that include feet and inches typically show feet as whole numbers and inches as fractions or additional whole numbers. In this case, the measurement indicates a length that is 2 feet long and an additional 1 inch.
2.5cm
by the numbers that are marked there
The numbers of contour lines indicate altitude or elevation along that line.
A number (such as 1, 2, or 3) used in counting to indicate quantity but not order.