# Mathematics for Common Schools, Parte3

D.C. Heath, 1893

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### Contenido

 ALGEBRAIC EQUATIONS 449 Sight Exercises 452 CHAPTER XI 459 MEASUREMENTS 467 BANK DISCOUNT 489 COMMERCIAL DISCOUNT 509 SURFACES AND VOLUMES 517 SIMPLE INTEREST 519
 PROPORTION 624 MEASUREMENTS 643 PARTIAL PAYMENTS MERCHANTS RULE 653 MENSURATION OF PLANE SURFACES 667 SURFACES OF SOLIDS 681 VOLUMES 688 CUBE Root 699 ANNUAL INTEREST 719

 COMMERCIAL DISCOUNT 529 MEASUREMENTS 550 PARTNERSHIP 558 COMPOUND INTEREST 565 EXCHANGE 575 CHAPTER XIII 588 SURFACES AND VOLUMES 601 SQUARE Root 607
 CHAPTER XV 728 Two UNKNOWN QUANTITIES 736 THREE UNKNOWN QUANTITIES 742 MULTIPLICATION OF ALGEBRAIC QUANTITIES 745 CHAPTER XVI 755 CALCULATION OF HEIGHTS AND DISTANCES 785 VOLUMES 797 Derechos de autor

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Página 798 - V9 x 25 sq. ft. = 15 sq. ft. NOTE. — The mean proportional between two numbers is equal to the square root of their product. 13. Find the volume of the frustum of a square pyramid, its upper base containing 64 square inches, and its lower base 196 square inches, its altitude being 18 inches. 1294. Note that the mean proportional between 64 and 196 is 8 x 14, or 112. Since each is multiplied by one-third of the altitude, the operation is shortened by adding together the three areas, 64, 196, and...
Página 720 - MEASURE. 10 millimeters (mm.) = 1 centimeter (cm.) 10 centimeters = 1 decimeter (dm.) 10 decimeters = 1 meter (m.) 10 meters = 1 dekameter (Dm.) 10 dekameters = 1 hektometer (Hm.) 10 Hektometers = 1 kilometer (Km.) 10 kilometers = 1 myriameter (Mm.) 1 meter = 39.37 inches.
Página 789 - Prisms may be either right or oblique. The convex surface of a right prism consists of rectangles. Fig. 1 is a right prism; Fig. 2 is an oblique prism. NOTE. — When a prism is spoken of, a right prism is meant unless the word oblique is used. The altitude of a prism is the perpendicular distance between the bases. AD, BF, or CE is the altitude in Fig.
Página 532 - ... 14 ft. high, deducting for two doors, each 8 ft. by 4 ft., and for three windows, each 7 ft. by 3 ft.
Página 648 - If a horse dealer buys a span of horses at 10 per cent less than their value, and sells them at 10 per cent more than their value, what per cent does he make ? 10.
Página 803 - TROY WEIGHT. 24 grains (gr.) 1 pennyweight (pwt.) 20 pennyweights, 1 ounce (oz.) 12 ounces ... 1 pound (Ib.) Troy weight is used in weighing gold, silver, precious stones, etc. APOTHECARIES