over 10 hours, how much should be paid him for working during a certain day from 7 A.M. to noon, and from 1 P.M. to 8 P.M.? 28. A gallon contains 231 cubic inches and a bushel 2150.42 cubic inches; find, correct to the nearest hundredth, the number of gallons in a bushel. 30. When 9 is paid for the loan of $2, the sum paid is what decimal part of the loan? 31. A mechanic is receiving $3 a day (10 hours) and 50 an hour for overtime. During a certain week he works each working day from 7 A.M. to noon, from 1 P.M. to 6 P.M., and from 7 P.M. to 10 P.M.; what are his wages for that week? 32. The average age of the 24 girls in a certain school is 13.55 years; what will be the average age, correct to the nearest hundredth, of the girls in this school, if 6 more enter whose ages average 14.62 years? 33. Simplify: .006.02 x .02+.006+.002 x 60÷.12. 34. How many pounds of butter fat does a herd of 25 cows produce in a week, if they average 24 lb. of milk daily, and the milk tests .04 butter fat? 35. A dealer bought 10,000 cigars at $4.50 per 100 and retailed them at 3 for 25; find his profit. 36. The weight of a common brick is about 4.5 lb. A man who wishes to haul as nearly as possible 2000 lb. should load how many bricks? 37. A dairyman in Wisconsin recently reported an average of 420 pounds of butter fat per year from a herd of 29 cows. The average price of butter fat at the local creamery was $0.32 a pound. What was the average profit made from each cow of this herd? What was the profit made from the whole herd? The cost of keeping this herd was estimated at $50 per cow. What was the average net profit from each cow, and the net profit from the whole herd? 38. Fill in the missing averages: REGULAR FARM DAILY AVERAGE OF HOURS OF LABOR OF DENOMINATE AMOUNTS 126. Denominate units are units established by custom or law to measure such quantities as weight, capacity, length, surface, etc. Thus, a pound, a bushel, a yard, an acre, etc., are denominate units. REMARK. For convenience there are usually several units of the same kind of quantity adopted, having fixed relations to one another. Thus, the yard is the standard unit of length. The yard is divided into three equal parts called feet, and the foot is divided into twelve equal parts called inches. 127. A simple denominate amount is any number of like denominate units. Thus, 3 bushels, 51⁄2 yards, and of a gallon are simple denominate amounts. REDUCTION [Review thoroughly tables studied in the lower grades. See page 360.] 7. 4 da. as minutes. 8. 3.25 sq. yd. as square inches. 10. 4hhd. as gallons. II. 3 reams as sheets. 12. 100 qt. as bushels. 14. 288 in. as yards. 15. 15,730 sq. yd. as acres. 16. 825 in. as rods. MISCELLANEOUS PROBLEMS Exercise 42 1. How many sacks, holding 25 lb. each, can be filled from a ton of sugar? 2. A long ton is how many times a short ton? 3. A ship sank in 30 fathoms of water; how many feet deep is the water? 4. A horse whose height is 15 hands is how many feet high? 5. If a horse eats 1 pk. of oats (standard weight) at a meal, in how many days, eating 3 meals a day, will he eat a ton of oats? 6. A farmer stepped the length of his field and found it to be 160 paces (3.3 ft.); find the length of the field in rods, |