Briefly explain why the given construction showing that the collection of decidable languages is closed under union does not show that the class of Turing-recognizable languages is closed under union.

Assume that you have an sorted array of records. assume that the length of the array (n) is known. give two different methods to search for a specific value in this array. you can use english or pseudo-code for your algorithm. what is the time complexity for each algorithm and why?

An english teacher would like to divide 8 boys and 10 girls into groups, each with the same combination of boys and girls and nobody left out. what is the greatest number of groups that can be formed?

Retype the statements, correcting the syntax errors. system. out. println("num: " + songnum); system. out. println(int songnum); system. out. println(songnum " songs"); note: these activities may test code with different test values. this activity will perform two tests: the first with songnum = 5, the second with songnum = 9. see how to use zybooks.