The following is a brief and easy method of computing interest at any rate and time: 26. Find the interest of $324 for 1 yr. 5 mo. 15 da. at 5%. Since 30 da. are reckoned as 1 mo., 3 da. is or .1 of a month, and 15 da. is .5 of a month; hence, 1 yr. 5 mo. 15 da. equals 17.5 mo. So any number of days is changed to tenths of a mo. by dividing by 3. Thus, 12 da. is .4 of a mo.; 18 da., .6; 22 da., .7, etc. $324 Principal. .05 Rate. 12) $16.20 Int. for 1 yr. 1.35 Int. for 1 mo. 17.5 Time in mo. $23.625 Int. for 1 yr. 5 mo. 15 da. Find by either method the interest of each of the following principals, for the time specified, at 4%, 5%, 6%. 27. $48.75, 2 yr. 6 mo. 31. $142.50, 1 yr. 2 mo. 6 da. 32. $106.84, 2 yr. 1 mo. 15 da. 33. $76.80, 3 yr. 4 mo. 21 da. 34. $960, 2 yr. 0 mo. 24 da. Find the interest and the amount of each of the following principals, at 6%; 7%; 8%; 10%; 51%; 4%. 35. $327.50, 1 yr. 6 mo. 36. $1140, 2 yr. 1 mo. 38. $516.25, 2 yr. 4 mo. 3 da. 39. $1000, 0 yr. 7 mo. 18 da. 37. $45.80, 4 yr. 7 mo. 40. $76.84, 3 yr. 0 mo. 15 da. 41. Paid a debt of $184.75, which had been upon interest 11 mo. 21 da. at 7%. What was the amount paid? 42. If I borrow $860 at 51%, what will be due at the end of 9 mo. 24 da. ? 43. What is due on a note of $384.50, that has run 2 yr. 8 mo. 6 da., at 6%? 44. In settling with a merchant, I give my note for $245.80. What is due in 11 mo. 15 da., at 5%? TABLES OF MEASURES. MONEY. 91. 1. Money is the measure of the value of things. 2. United States Money is the legal money of this The money of the Dominion of Canada is the same in denomination as that of the United States. 92. English or Sterling Money is the legal currency of Great Britain. MEASURES OF WEIGHT. 93. Troy Weight is used in weighing gold, silver, 94. Apothecaries' Weight is used by apothecaries and physicians in compounding dry medicines. Medicines are bought and sold in quantities by Avoirdupois weight. 95. Avoirdupois Weight is used for all the ordinary purposes of weighing. |