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2. In 9 cwt. 2 qrs. 17 lb. gross, tare 41 lb. trett 4 lb. per 104 lb. how much neat? Ans. Scut. Sqrs. 20lb.
3. In 15 chests of sugar, weighing 117 cwt. 21 ib. gross, tare 173 lb. trett 4 lb. per 104, how many cwt. neat ?
Ans. illcut. 22lb. 4. What is the neat weight of 3 tierces of rice, cach weighing 4 cwt. 3 qrs. 14 lb. gross, tare 16 16. per cwt and allowing trett as usual ?
Ans. 12ewt. Oqrs. tib. 5. In 25 barrels of fiys, each 84 ib. gross, tare 12 lb, per cwt. trett 4 lb. per 104 lb.; how many pounds neat?
Ans. 1803 +6. What is the value of the neat weight of 4 barrels of Spanish Tobacco; numbers, weights, and allowances as follows, at 9 d. per pound?
cwt. grs, lb. No I Gross 1 2 15 2
1 0 25 3
09 0 3 21
Tare 16 15. per cwt.
Ans. £17 168 5d.
CASE V. When Tare, T'rett, and Cloff are allowed : Deduct the tare and trett as before, and divide the suttle by 168 (because 2 lb. is the tag of 3 cwt.) the quo. tient will be the cloff, which subtract from the suttle, and the remainder will be the neat weight.
1. In 3 hogsheads of Tobacco, each weighing 13 cwt. Sqrs. 23 lb. gross, tare 107 lb. per hogshead, trett 4 Ib. per 104 lb. and cloff 2 lb. per 3 cwt. as usual; how much neat.
cwl. grs. lb.
1563 lb.gross of 1 hlid.
gross. 107 X3 = 321 tare.
168) 4200 suttle.
Ans. 4175 neat weight. 2. What is the ncat weight of 26 cwt. 3 qrs. 20 lb. gross tare 52 lb. the allowance of trett and cloff as usual? Ans. Heat 25cwt. Igr. 5lb. 1oz. nearly; omitting
INTEREST is of two kinds ; Simple and Compound.
SIMPLE INTEREST. Simple Interest is the sum paid by the borrower to the lender for the use of money lent; and is generally at a certain rate per cent. per annum, which in several of the United States is fixed by law at 6 per cent. per annum ; that is, 61. for the use of 1001. or 6 dollars for the use of 100 dollars for one year, &c.
Principal, is the sum lent.
RULE, Multiply the principal by the rate per cent. and divide the product by 100; the quotient will be the answer.
EXAMPLES. 1. What is the interest of 391. 11s. 83d. for one year, at Gl. per cent. per annum ?
d. 89 11 8
Ans. £279. 60.1. 2. What is the interest of 2361. 103. 4d. for a year, at 5 per cent. ?
Ans. £11 165. Ocho
3. Wat is the interest of 5711.-13s. Id. for one year, at 61. per cent. ?
Ans. £34 6s. Ojd. 4. Vyhat is the interest of 21. 128. 9d. for a year, at 61. per cent?
Ans. £0 3s. ed.
FEDERAL MONEY. 5. What is the interest of 468 dols. 45 cts. for one year at 6 per cent. i
$ cts. 468, 45
2810, 70=828, 10cts. 711. Ars, Isere I cut off the two right hand integers, which divide by 100: but to divide federal money by 100, you need only call the dollars so many cents, and the inferior denominations decimals of a cent, and it is done.
Therefore you may multiply the principal hy the rate, and place the separatrix in the product, as in multiplica tion of federal money, and all the figures at the left of the separatrix, wi!l be the interest in cents, and the first figure on the right will be mills, and the others decimals of a mill, as in the following
EXAMPLES 6. Required the interest of 135 dols. 25 cts. for a year
Scts. 135, 25
811, 50=88, 11cts. 5mAns. 7. What is the interest of 19 dculars 51 cents for one year at 5 per cent. ? $ cts.
97, 55=97cts, 5 }m. Ans. 8. What is the interest of 436 donars for one year, at 6 per cerit
ANOTHIER METHOD. Write down the given principal in cents, which multiply by the rate, and divide by 100 as before, and
will have the interest for a year, in cents, and decimals of a cent, as follows:
9. What is the interest of 873, 65 cents for a year, at 6 Principal 7365 cents.
per cent. ?
7 per cent. P
Ans. 41,90cts.=441%cts. or S4, 410's. 9m. 10. Required the interest of $85, 45cts. for a year, at
Ans. 598, 15 cents,85,98cts. 13m.
CASE II. To find the simple interest of any number of years, and parts of a year.
GENERAL RULE. :
1st. Find the interest of the given sum for one year.
2d. Multiply the interest of one year by the given number of years, and the product will be the answer for that time.
Su. If there be parts of a year, as inonths and days, work for the months by the aliquot parts of a year, and for the days by the Rule of Three Direct, or by allowing 30 days to the month, and taking aliquot parts of the
* By allowing the month to be 30 days, and taking aliquot parts thereof, you will have the interest of any ordina:'y sum sufficiently exact for common use; but is the sum be very large, you may say,
As 365 days : is to the interest of one year : : so is the giver number of davs : to the interest required.