8. Use an abbreviated table to determine whether the following arguments are valid or invalid.
a. (A ∨ B) ⊃ C, (B ∙ C) ⊃ D, ∴ A ∨ D
b. F ∙ (G ≡ H), I ⊃ (J ∨ K), (F ∙ G) ∨ K, ∴ I ∨ H
c. P ≡ (Q ≡ R), Q ≡ (S ≡ T), S ≡ (T ⊃ P), ∴ R ≡ S

In “the first seven years” by bernard malamud, how does sobel’s love of reading contrast with feld’s feelings about education?

Compare and contrast the impact of global commerce on european and asian dynasties. did any dynasty hold an advantage over others in controlling commercial networks and using them to enrich their societies?

In a recent telephone survey, 5,000 randomly selected teenagers were asked to cite their primary social network site. six of 10 teenagers said they use mybook as their primary social network site. a 95% confidence interval to estimate the true proportion of teenagers who use mybook as their primary social network site is found to be (0.2964, 0.9036). which of the following is a correct interpretation of the confidence level? ninety-five percent of all samples of this size would yield a confidence interval of (0.2964, 0.9036). there is a 95% chance that the true proportion of teenagers who use mybook as their primary social network site is in the interval (0.2964, 0.9036). ninety-five percent of the time, the procedure used to generate this interval will capture the true proportion of teenagers who use mybook as their primary social network site. ninety-five percent of all the samples of size 5,000 lie in the confidence interval (0.2964, 0.9036).