Ch. 6-7 - = 19,500,000,000 kg 7.4 6) 1 in. = 2.54 cm 72 in....

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6.1 58 a) 9% = 9% = 0.09 c) 6% = 6% = = 0.06 6.2 34) = 1.5 = 150% 6.3 12) R% = 75% B = “what number” (the unknown) A = 150 18) B = 750 A = 75 R% = “what percent” (the unknown) 6.4 46)
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6.5 B = 325 × 100 B = = 5,000 So, 325 is 6.5% of 5,000 50) Rate is rounded to 49% A = = 735 6.5 6) I = P × R 2,500 R = 275 × 100 R = = 11% 26) A = R × B A = 7/100 × 900 = 63 Amount of increase = 63 students Amount of new enrollment = 900 + 63 = 963 students 42) 40 x = 300 × 100 T = 750 seconds 56) 85% = = 0.85 8,882 × 0.85 7,549.7 7,550 thousand barrels
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68) 18,500 × 10.3 ÷ 100 + 18,500 = $20,442.50 70) 100% - 8.2% = 91.8% 6,400 × 91.8 ÷ 100 = $5,875.20 7.1 50) 3 h 20 min 4 h 25 min - 5 h 35 min 12 h 80 min = 13 h 20 min 54) 9 lb 15 oz - 5 lb 8 oz 4 lb 7 oz 74) 1 pt 9 fl oz 5 pt 16 fl oz +2 pt 10fl oz - 4 pt 3 fl oz 3 pt 19 fl oz 1 pt 13 fl oz = 4 pt 3 fl oz Answer: 1 pt 13 fl oz remains. 7.2 50) a) kilometer (km) b) centimeter (cm) c) millimeter (mm) d) meter (m), or/and centimeter (cm) 7.3 70) 19,500,000 t =
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Unformatted text preview: = 19,500,000,000 kg 7.4 6) 1 in. = 2.54 cm 72 in. = 72 in. ( ) = 182.88 cm 12) 1 L = 1.06 qt 7 L = 7 L ( ) = 7.42 qt 18) 1 mi = 1.6 km 55 mi/h = 55 mi/h ( ) = 88 km/h 7.5 6) Line 26) YXZ or ZXY 52) m a = 56 (vertical angles) Since m a and m b are supplementary, m b = 180 - m a = 180 - 56 = 124 m b and m c are vertical angles, so m c = m b. m c = 124 7.6 2) Obtuse triangle (has an obtuse angle) 10) Scalene triangle (no two angles have the same measure) 24) Since the triangle is isosceles, m D = m F , and since m E + m D + m F = 180, m D + m F = 180 -72 = 108 Since m D = m F, 1082 = 54 26) Triangles (a) and (b) are similar because they have the same angle measurements 44) = 12.5 meters 7.7 4) = 14 because 14 14 = 196 16) 49 + = 625 = 625 49 b = = 24 The missing side is 24....
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This note was uploaded on 04/09/2010 for the course MATH Math 115 taught by Professor Na during the Spring '10 term at Phoenix School of Law.

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Ch. 6-7 - = 19,500,000,000 kg 7.4 6) 1 in. = 2.54 cm 72 in....

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