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The teachers assistant. Or, A system of practical arithmetic; wherein the several rules of that useful science, are illustrated by a variety of ... designed to abridge the labour of teacher - Softcover
Synopsis
This historic book may have numerous typos and missing text. Purchasers can download a free scanned copy of the original book (without typos) from the publisher. Not indexed. Not illustrated. 1811 Excerpt: ...per annum? Ans. 49L. 4s. 3d. 6. What is the interest of 300 dollars for one year, at 6i dollars.per cent. per. annum? Ans. g 18.75. CASE 3. When the interest of a given sum for several years, is required. RULE. Multiply the interest of the given sum for one year, by tlic number of years given. PROOF. By the Double Rule of Three. EXAMPLES. 1. What is the interest of 700 dollars for 5 years, at 6 dollars per cent. per annum?, Ans. g 210.00/ 700 6 Interest for one year g 42.00 5 Interest for 5 years 8 210.00 2. What is the interest of 750L. for 3 years, at 6L. per cent. per annum? Ans. 135L. 3. What is the interest of 375L. 10s. 6d. for 4 years, at 7L. per cent. per annum? Ans. 105L. 2s. lid. 4. What is the interest of 353L. 6s. 3d. for 9 years, at 6L. per cent. per annum? Ans. 158L. 19s. 9d. 5. What is the interest of g 438.25 for 5 years, at 6 dollars per cent. per annum? Ans. g 131.47. 6. What is the interest of lOOOL. for 4 years, at 6iL. per cent. per annum? Ans. 250L. 7. What is the interest of 171 lL. 15s. for 2 years, at 5L. per cent. per annum,? Ans. 196L. 17s. 8. What is the interest of 320 dollars for 6 years, at 5 dollars per cent. per annum? Ans. 8105.60. 9. On a mortgage for 1256 dollars there is 4 years interest due, at 6 dollars per cent. per annum, which is to be paid with the principal; what sum will discharge the debt? Ans. g 1557.44. '-ift' CASE 4. When the given time is months, weeks, or days, less, or more than a year. K RULE. As the months, weeks, or dys in a year,, Are to the interest of the given sum for one year; So are the months, weeks, or days in the given time,, To the interest required. Or, take parts of the yearly interest for the aliquot parts of a year that are in the given time, and add the interest for the odd days (if any) ...
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