Math 081 W2010 Exam 1 Ch 4.4 to 4.6 V 01 Preparation Dressler Name Multiply. 1) 0.170 2.4 6) 0.0089 8.6 2) 87.7 3.4 7) 0.07 0.03 8) 0.56 0.8 3) 0.0070 16.91 9) 0.0909 3.03 4) 0.05 0.2 10) 1478 0.67 11) 5005 0.4004 5) 0.107 0.9 Estimate the product by rounding each number. 12) 29.4 4.9 13) 7.4 36 1
14) 7.31 9.09 Write the number in standard form. 24) Ellen and Juan's new internet site received a record 18.9 million visitors in its first week. 15) 0.024 216.1 25) At its annual shareholders' meeting, the CEO announced that the company had made $16.09 billion dollars in sales that year. Multiply. 16) 5.1 1000 17) 7.6 0.01 26) The network reported that nearly 29.4 million viewers had watched its number-one comedy show the previous night. 18) 731.38 100 19) 0.9847 100 Find the circumference of the circle. Then use the approximation 3.14 for π and approximate the circumference. 27) 20 yd 20) 0.3247 1000 28) 21) 0.000179 1000 7 in. 22) 8.6 0.01 23) 7432 0.001 2
29) 17.5 yd Divide. 34) 7 4.9 35) 18 10.926 30) 11.7 ft 36) 0.04 1.4 37) 8.0 63.2 Solve. 31) A farmer is planning to plant wheat in circular plots. The diameter of each plot is to be 57.1 yd. What will be the circumference of each of the farmer's plots of wheat? (Use 3.14 for π.) 38) Divide 18 by 0.06 39) 676 33.8 32) A windmill is constructed having blades 10.7 feet long. The length of the blades will be the radius of the circle which the windmill will sweep. What is the circumference of the circle which the windmill will sweep? (Use 3.14 for π.) 40) 17.52 7.3 33) The nutrition chart on a bag of flavored cheese puffs says that each serving contains 0.36 grams of sodium. The chart also says that there are 6 servings in the bag. How many grams of sodium are in the entire bag of cheese puffs? 41) 6.4 0.08 42) 387.5 12.5 3
43) 684 22.8 51) 0.0832 4 Divide, and round the quotient as indicated. 44) Divide 5.65 by 32 and round the quotient to the nearest hundredth. 52) 148.74 54.6 53) 227 0.176 45) Divide 1.973 by 5.5 and round the quotient to the nearest hundredth. 46) Divide 9.62 by 0.083 and round the quotient to the nearest tenth. Divide. 54) 112.28 1000 55) 3.04 1000 47) Divide 168.03 by 6.7 and round the quotient to the nearest thousandth. 56) 0.051 10 48) Divide 1758.98 by 0.026 and round the quotient to the nearest ten. 57) 18.24 1000 49) Divide 711.83 by 0.058 and round the quotient to the nearest hundred. 58) 94.69 10 Estimate the quotient by first rounding each number. 50) 8.14 2 59) 0.66 1000 4
Solve. 60) In a track meet, Ashley runs 600 meters in 91.0 seconds. What was her average speed in meters per second? (Round to the nearest tenth.) 66) In one year, a baseball player got 127 hits in 384 times at bat. What was his batting average? Give decimal notation to the nearest thousandth. 61) Dominique buys $12.20 worth of gasoline for her car. If the gas station charges $1.549 per gallon, how many gallons did she get? (Round to the nearest tenth.) 67) The water in a tank weighs 842.92 lb. One cubic foot of water weighs 62.5 lb. How many cubic feet of water are in the tank? 62) There are approximately 3.28 feet in 1 meter. How many meters are there in 85 feet? (Round to the nearest hundredth.) 68) There are 2.54 centimeters in an inch. If a painting in a museum is 140 centimeters wide, how wide is the painting in inches. Round answer to the nearest hundredth, if necessary. 63) Madison, Jeff, and Todd enter a 40.0-mile bicycle team relay race. They complete the course in 1.78 hours. What was their average speed on the course? (Round to the nearest tenth.) Simplify the expression. 69) (3.7)2 70) 3 + 0.5 0.5 64) In one week, Ashok worked 33.25 hours walking dogs and earned $244.25, including tips. How much did Ashok earn per hour? (Round to the nearest cent if necessary.) 71) 1.4(9-8.4) 65) Some desert areas get only 8-10 inches of rainfall per year (365 days). If in one year the rainfall was 8.25 inches, what was the average daily rainfall for that year? (Round to the nearest thousandth.) 72) (4.7)(1000) - (4.7)(100) 73) (7.4)2 + 9.5-6.8 5
74) 2.25 4.23 8.5 Round to the nearest hundredth if necessary. 82) One square kilometer equals approximately 0.386 square mile. Using this conversion, how many square miles is 53 square kilometers? Round to the nearest hundredth. 75) 35.7-6.2 4.9 76) 23.9-6.9 8.9 25.9 Round to the nearest hundredth if necessary. 83) A printing company charges $2.2995 for each color flyer it prints. What would be the cost (before tax) for printing 250 color flyers? (Round the answer to the nearest cent.) 77) (7.7 + 7.4)(6.4-3.7) 84) There are 2.54 centimeters in an inch. If a board is 15.3 inches long, how long is it in centimeters? 78) (8.2) 2 100 Write the fraction as a decimal. If necessary, use repeating decimal notation. 85) 15 16 Solve. 79) Gustav earns $13.67 per hour at his job. He worked 19 hours last week. Calculate Gustav's pay before taxes. 86) 3 20 80) A meter is a unit of measure in the metric system that is approximately equal to 39.37 inches. Louis is 2 meters tall. What is his approximate height in inches? (Round to the nearest hundredth.) 87) 59 16 81) A farmer sells 9500 bushels of corn for $2.90 a bushel. How much did the farmer receive? 88) 57 20 6
89) 14 15 97) 131 3 90) 1 11 98) 127 4 91) 2 19 20 Write the fraction as a decimal. Round to the nearest thousandth if necessary. Solve. 99) A survey taken in an elementary school revealed that 18 of the first-graders did not 97 eat or drink a milk product at least one time every day of the week. Write this amount as a decimal, rounding to the nearest hundredth. 92) 3 5 100) An organization surveys its members and finds that 8 of them don't like broccoli. Write 17 93) 19 26 this fraction as a decimal. Round to the nearest thousandth, if necessary. 94) 155 291 101) Prof. Al-Badul calculated that 4 of her 5 students passed their college algebra exam. Write this fraction as a decimal, rounding to the nearest thousandth if necessary. 95) 5 131 102) Prof. Al-Badul calculated that 1 4 of her 96) 11 10 students passed their college algebra exam. Write this fraction as a decimal, rounding to the nearest thousandth if necessary. 7
Insert <, >, or = between the pair of numbers to form a true statement. 103) 0.272 0.274 Arrange the list of numbers in order from smallest to largest. 111) 0.09, 0.02, 0.029, 0.092 104) 0.484 0.444 112) 0.052, 0.025, 0.022, 0.055 105) 111 14 7.929 113) 0.053, 0.035, 0.033, 0.055 114) 1.754, 1.547, 1.574, 1.457 106) 5 3 1.665 115) 5.14, 4.68, 4.86, 5.41 107) 27 4 6.75 116) 2.09, 2.9, 2.099, 2.999 108) 7 9 43 55 117) 4 5, 6 7, 5 6, 0.95 109) 1 2 27 55 118) 6.25, 6 5 8, 6.52, 64 9 110) 3 8 23 63 8
Find the area of the triangle or rectangle. Round to the nearest thousandth, if necessary. 119) 124) 48 cm 31 yd 27.5 cm 44 yd 120) 125) 5 8 m 26 m 0.81 m 43 m 121) 32 cm 50.5 cm 126) 3 4 ft 0.85 ft 122) 30 ft 24.5 ft 127) 7 8 ft 123) 1.3 ft 38 in. 45.5 in. 9
Answer Key Testname: E02PREPCH04.4TO4.6V01 1) 0.408 2) 298.18 3) 0.11837 4) 0.01 5) 0.0963 6) 0.07654 7) 0.0021 8) 0.448 9) 0.275427 10) 990.26 11) 2004.002 12) 150 13) 280 14) 63 15) 4 16) 5100 17) 0.076 18) 73,138 19) 98.47 20) 324.7 21) 0.179 22) 0.086 23) 7.432 24) 18,900,000 25) $16,090,000,000 26) 29,400,000 27) 62.8 yd 28) 43.96 in. 29) 54.95 yd 30) 73.476 ft 31) 179.294 yd 32) 67.196 ft 33) 2.16 g 34) 0.7 35) 0.607 36) 35 37) 7.9 38) 300 39) 20 40) 2.4 41) 80 42) 31.0 43) 30 44) 0.18 45) 0.36 46) 115.9 47) 25.079 48) 67,650 49) 12,300 50) 4 10
Answer Key Testname: E02PREPCH04.4TO4.6V01 51) 0.02 52) 3 53) 1000 54) 0.11228 55) 0.00304 56) 0.0051 57) 0.01824 58) 9.469 59) 0.00066 60) 6.6 m/s 61) 7.9 gal 62) 25.91 m 63) 22.5 mi/hr 64) $7.35 65) 0.023 in. 66) 0.331 67) 13.48672 cu. ft 68) 55.12 in. 69) 13.69 70) 7 71) 0.84 72) 4230 73) 57.46 74) 4.52 75) 5.32 76) 3.82 77) 40.77 78) 0.6724 79) $259.73 80) 78.74 in. 81) $27,550.00 82) 20.46 sq. miles 83) $574.88 84) 38.86 cm 85) 0.9375 86) 0.15 87) 3.6875 88) 2.85 89) 0.93 90) 0.09 91) 2.95 92) 0.6 93) 0.731 94) 0.533 95) 0.038 96) 1.1 97) 43.667 98) 31.75 99) 0.19 11
Answer Key Testname: E02PREPCH04.4TO4.6V01 100) 0.471 101) 0.8 102) 0.25 103) < 104) > 105) < 106) > 107) = 108) < 109) > 110) > 111) 0.02, 0.029, 0.09, 0.092 112) 0.022, 0.025, 0.052, 0.055 113) 0.033, 0.035, 0.053, 0.055 114) 1.457, 1.547, 1.574, 1.754 115) 4.68, 4.86, 5.14, 5.41 116) 2.09, 2.099, 2.9, 2.999 117) 4 5, 5 6, 6 7, 0.95 118) 6.25, 6 4 9, 6.52, 65 8 119) 682 sq. yd 120) 559 sq. m 121) 808 sq. cm 122) 367.5 sq. ft 123) 864.5 sq. in. 124) 660 sq. cm 125) 0.506 sq. m 126) 0.638 sq. ft 127) 1.138 sq. ft 12