## Logarithms and Metric Measures |

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adjacent mantissas alike annuity Apothem of regular arithms centre characteristic chord circle circumference colog cologarithm column headed common logarithm compound interest continued fraction corresponding number decagon deciliters decimal point decimeters denominator denoted different arrangements divided equilateral triangle exponent Express factors Find the area Find the length find the logarithms Find the number Find the value formed given mantissa given number hektars hektoliters hektometers Hence hypotenuse included angle index law kilogram kilometer letters loga longest side mantissa for 1576 money is worth multiply negative nth root number corresponding number is found number of arrangements number of different number of selections number of things periodic continued fraction positive integers positive number proper fraction q things quotient ratio regular hexagon repetitions are allowed required number rhombus right triangle significant figures specific gravity square dekameters square meters sters Subtract system whose base thick vowel whole number

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Page 5 - If the number is less than 1, make the characteristic of the logarithm negative, and one unit more than the number of zeros between the decimal point and the first significant figure of the given number.

Page 17 - Any positive number being selected as a base, the logarithm of any other positive number is the exponent of the power to which the base must be raised to produce the given number. Thus, if a

Page 3 - B. 4. The logarithm of a power of a number is found by multiplying the logarithm of the number by the exponent of the power. For, AŤ = (10°)

Page 85 - The number of combinations of n things taken r at a time is the same as the number of combinations of n things taken n — r at at hue.

Page 26 - Measures of Capacity 10 milliliters (ml) =1 centiliter cl 10 centiliters =1 deciliter dl 10 deciliters =1 liter 1 10 liters =1 dekaliter Dl 10 dekaliters =1 hektoliter HI 10 hektoliters =1 kiloliter Kl NOTE — The liter is equal to the volume occupied by 1 cubic decimeter.

Page 38 - If in a right triangle a perpendicular is drawn from the vertex of the right angle to the hypotenuse : I.

Page 39 - Find an expression for the area of a triangle in terms of its sides. The lengths of the sides of a triangle are 3 feet, 5 feet, and 6 feet ; what is its area ? 11. Given that sin 38° 25' = 0.6213757, sin 38° 26' = 0.6216036 ; find the angle whose sine is 0.6215000.

Page 20 - The quotient of a power by another power of the same number may be expressed by writing the number with an exponent equal to the exponent of the dividend diminished by the exponent of the divisor.

Page 22 - The logarithm of the quotient of two positive numbers is found by subtracting the logarithm of the divisor from the logarithm of the dividend.

Page 92 - How many 6-digit numbers can be formed from the digits 1, 2, 3, 4, 5, 6, 7, 8, 9 if each number has 3 odd and 3 even digits and no two digits are alike?