Friday
December 13, 2013

# Posts by Natasha

Total # Posts: 322

physics
An 18-year-old runner can complete a 10.0 km course with an average speed of 4.58 m/s. A 50-year-old runner can cover the same distance with an average speed of 4.36 m/s. How much later (in seconds) should the younger runner start in order to finish the the course at the same ...

algebra
Which is an example of the commutative property? A. –8 + (–13) = –13 + (–8) B. 11 + (–14 + 5) = (11 + (–14)) + 5 C. 16 + (–16) = 0 D. –(22 + 1) = –22 + (–1)

football names
What is the football name of this clue, seven squared?

Chem
using math expressions, define the following: Ka,pKa, pKb, Kb and pKw

biostatistics
A clinical trial is run to assess the effects of different forms of regular exercise on HDL levels in persons between the ages of 18 and 29. Participants in the study are randomly assigned to one of three exercise groups - Weight training, Aerobic exercise or Stretching/Yoga ...

statistics
Suppose that in the aerobic exercise group we also measured the number of hours of aerobic exercise per week and the mean is 5.2 hours with a standard deviation of 2.1 hours. The sample correlation is -0.42. a)Is there evidence of a significant correlation between number of ho...

biostatistics
7. Consider again the data in problem #6. Suppose that in the aerobic exercise group we also measured the number of hours of aerobic exercise per week and the mean is 5.2 hours with a standard deviation of 2.1 hours. The sample correlation is -0.42. a)Is there evidence of a si...

biostatistics
8. The following data were collected in a clinical trial to compare a new drug to a placebo for its effectiveness in lowering total serum cholesterol. Generate a 95% confidence interval for the difference in mean total cholesterol levels between treatments. New Drug (n=75) Pla...

biostatistics
Suppose we want to design a new placebo-controlled trial to evaluate an experimental medication to increase lung capacity. The primary outcome is peak expiratory flow rate, a continuous variable measured in liters per minute. the primary outcome will be measured after 6 months...

history
How did african slavery contributed to the economic growth of the british economy

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