Posts by Nathalia
Total # Posts: 14
All of the following factors are related to the plate tectonic model of the western coast of South America except the 1) length of the coastline 2) pattern of the earthquake activity 3) location of volcanoes 4) density of crustal plates 5) location of mountain ranges
June 21, 2016
From the top of a cliff, a person uses a slingshot to fire a pebble straight downward, which is the negative direction. The initial SPEED of the pebble is 9.7 m/s and it was thrown DOWN (watch your signs).
September 15, 2013
A cat is stuck in a tree. You are designated with the job to get it out, yet you do not want to climb the tree, because you may get stuck as well. Instead you set up a pulley system. A rope (consider it massless) runs from the seat you sit on over an ideal pulley and then to ...
March 18, 2013
The height (in centimeters) of a candle is a linear function of the amount of time (in hours) it has been burning. When graphed, the function gives a line with a slope of 0.4. What is the height of the candle after it has been burning for 8 hrs?
June 10, 2012
The First National Bank of Wilson has 680 checking account customers. A recent sample of 60 of these customers showed 32 to have a Visa card with the bank. Construct the 98 percent confidence interval for the proportion of checking account customers who have a Visa card with ...
October 31, 2011
During a national debate on changes to health care, a cable news service performs an opinion poll of 570 small-business owners. It shows that 72 percent of small-business owners do not approve of the changes. (a) Develop a 90 percent confidence interval for the proportion ...
October 30, 2011
A survey is being planned to determine the mean amount of time corporation executives watch television. A pilot survey indicated that the mean time per week is 15 hours, with a standard deviation of 3.5 hours. It is desired to estimate the mean viewing time within one-quarter ...
October 30, 2011
b) How long would it take you to cover the 85 m length of the wolkway if once you get on the wolkway. you immediately turn around and started walking in the opposre direction with a speed of 1.3 m/s relative to the walkway?
October 2, 2011