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Problem 78
How many significant figures are in each number? d. 1.563300×1011 m
Problem 78c
How many significant figures are in each number? c. 108,700 km
Problem 79
Which numbers are exact (and therefore have an unlimited number of significant figures)? a. p = 3.14 b. 12 in = 1 ft c. EPA gas mileage rating of 26 miles per gallon d. 1 gross = 144
Problem 79a,c,d
Which numbers are exact (and therefore have an unlimited number of significant figures)? a. π = 3.14 c. EPA gas mileage rating of 26 miles per gallon d. 1 gross = 144
Problem 79b
Which numbers are exact (and therefore have an unlimited number of significant figures)? b. 12 in = 1 ft
- Is each number rounded to four significant figures? a. 156.852 b. 156.842 c. 156.849 d. 156.899
Problem 81
Problem 82
Round each number to three significant figures. a. 79,845.82 b. 1.548937×107 c. 2.3499999995 d. 0.000045389
Problem 83
Calculate to the correct number of significant figures. a. 9.15 ÷ 4.970 b. 1.54 × 0.03060 × 0.69 c. 27.5 × 1.82 ÷ 100.04 d. (2.290 × 106) ÷ (6.7 × 104)
Problem 84a
Calculate to the correct number of significant figures. a. 89.3 × 77.0 × 0.08
Problem 84b
Calculate to the correct number of significant figures. b. (5.01×105) / (7.8×102)
Problem 84c
Calculate to the correct number of significant figures. c. 4.005 × 74 × 0.007
Problem 84d
Calculate to the correct number of significant figures. d. 453 ÷ 2.031
Problem 85
Calculate to the correct number of significant figures. a. 43.7 - 2.341 b. 17.6 + 2.838 + 2.3 + 110.77 c. 19.6 + 58.33 - 4.974 d. 5.99 - 5.572
Problem 86
Calculate to the correct number of significant figures. a. 0.004 + 0.09879 b. 1239.3 + 9.73 + 3.42 c. 2.4 - 1.777 d. 532 + 7.3 - 48.523
Problem 86a,b,c
Calculate to the correct number of significant figures. a. 0.004 + 0.09879 b. 1239.3 + 9.73 + 3.42 c. 2.4 - 1.777
Problem 86d
Calculate to the correct number of significant figures. d. 532 + 7.3 - 48.523
Problem 87
Calculate to the correct number of significant figures. a. (24.6681 * 2.38) + 332.58 b. (85.3 - 21.489) , 0.0059 c. (512 , 986.7) + 5.44 d. [(28.7 * 105) , 48.533] + 144.99
Problem 88a,b
Calculate to the correct number of significant figures. a. [(1.7×106) / (2.63×105)] + 7.33 b. (568.99 - 232.1) / 5.3
Problem 88c
Calculate to the correct number of significant figures. c. (9443 + 45 - 9.9) × 8.1 × 106
Problem 88d
Calculate to the correct number of significant figures. d. (3.14 × 2.4367) - 2.34
Problem 89
A flask containing 11.7 mL of a liquid weighs 132.8 g with the liquid in the flask and 124.1 g when empty. Calculate the density of the liquid in g/mL to the correct number of significant digits.
Problem 91
Perform each unit conversion. a. 27.8 L to cm3 b. 1898 mg to kg c. 198 km to cm
Problem 92
Perform each unit conversion. a. 28.9 nm to mm b. 1432 cm3 to L c. 1211 Tm to Gm
Problem 93
Perform each unit conversion. a. 154 cm to in b. 3.14 kg to g c. 3.5 L to qt d. 109 mm to in
Problem 94a
Perform each unit conversion. a. 1.4 in to mm
Problem 94b
Perform each unit conversion. b. 116 ft to cm
Problem 94c
Perform each unit conversion. c. 1845 kg to lb
Problem 94d
Perform each unit conversion. d. 815 yd to km
Problem 95
A runner wants to run 10.0 km. Her running pace is 7.5 mi per hour. How many minutes must she run?
Problem 96
A cyclist rides at an average speed of 18 mi per hour. If she wants to bike 212 km, how long (in hours) must she ride?