4.) If the Cartesian product of A x B is {(1, 1), (1, 2), (3, 1), (3, 2), (5, 1), (5, 2)), what are the elements in set A and in set B?

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A: 1st answer is correct, given in the tutor solution. Because here (cosh y) is constant.  3rd option…

Q: Do 1 and 4.

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A: It is given that the mean θ=2.5 milligrams per liter.

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A: Dear student, Since you have posted two questions, as per our policy we will answer first question.…

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A: Double integral We can solve this double integration by conversion from cartesian to polar.

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Q: Please allof them.Thanks

A: 1) The mean is calculated as follows: x¯=20+11+20+11+165=785=15.6