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Mathematics, 22.06.2019 01:40
At wind speeds above 1000 centimeters per second (cm/sec), significant sand-moving events begin to occur. wind speeds below 1000 cm/sec deposit sand and wind speeds above 1000 cm/sec move sand to new locations. the cyclic nature of wind and moving sand determines the shape and location of large dunes. at a test site, the prevailing direction of the wind did not change noticeably. however, the velocity did change. fifty-nine wind speed readings gave an average velocity of x = 1075 cm/sec. based on long-term experience, σ can be assumed to be 245 cm/sec. (a) find a 95% confidence interval for the population mean wind speed at this site. (round your answers to the nearest whole number.) lower limit cm/sec upper limit cm/sec
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Mathematics, 22.06.2019 02:00
Lucy is a dress maker. she sews \dfrac47 7 4 ? of a dress in \dfrac34 4 3 ? hour. lucy sews at a constant rate. at this rate, how many dresses does lucy sew in one hour? include fractions of dresses if applicable.
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Mathematics, 22.06.2019 04:00
The ratio of the ages (in years) of three children is 2: 4: 5. the sum of their ages is 33. what is the age of each child?
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Mathematics, 22.06.2019 05:30
Problem ann increased the quantities of all the ingredients in a recipe by 60\%60%. she used 8080 grams (\text{g})(g) of cheese. how much cheese did the recipe require?
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Social Studies, 21.07.2019 00:30
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History, 21.07.2019 00:30
Biology, 21.07.2019 00:30
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Mathematics, 21.07.2019 00:30
Mathematics, 21.07.2019 00:30
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Geography, 21.07.2019 00:30
English, 21.07.2019 00:30