When an outbreak of African swine fever occurs, pigs in the country are ____________________, and often all the pigs in the area are slaughtered to prevent spread
Fill in the blank(s) with correct word
quarantined
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The walls of a metal fireplace are solid.
Answer the following statement true (T) or false (F)
The best method of leak checking is when the refrigeration system is ____.
A. in a vacuum B. open to the atmosphere C. operating with all fans activated D. standing with dry nitrogen pressure of 150 psig in the system
Blood is taken from each of n individuals to be tested for a certain disease. Rather than test each sample separately, a pooled method is used in an attempt to reduce the number of tests needed. Part of each blood sample is taken, and these parts are combined to form a pooled sample. The pooled sample is then tested. If the result is negative, then none of the n individuals has the disease, and no further tests are needed. If the pooled sample tests positive, then each individual is tested to see which of them have the disease.
a. LetX represent the number of tests that are carried out. What are the possible values of X?
b. Assume that n=4 individuals are to be tested, and the probability that each has the disease, independent of the others, is p=0.1. Find 
.
c. Repeat part (b) with n=6 and p=0.2.
d. Express as a function of n and p.
e. The pooled method is more economical than performing individual tests if < n. Suppose n=10. For what values of p is the pooled method more economical than performing n individual tests?
With the ____ method of depreciation, the annual depreciation amounts decline as the asset gets older.
A. declining-balance B. straight-line C. exponential D. delivery