(i) if a1, a2, . am are each countable sets, then the union theorem 1.5.8. a1 u a2 uam is countable. (ii) if a is a countable set for each n e n, then uan is countable.

How many cups of raisins do they haveall together? 2. about 210of the bones in your body arein your skull. your hands and skullcombined account for 720of you bones.how many bones do you have in yourhands? 3. for mother’s day, jen took her motherhiking. they hiked three trails. thearrowhead nature trail is 115of amile, the coquina baywalk is 210_ of amile, and the robinson preserve is 412of a mile. how far did they hike in all?

Eastern europe and parts of northern europe have which of the following climates?

If you were a casual recreational hiker with young children, which of the following trails would be least strenuous for a leisurely family outing? a. merced lake trail b. mirror lake loop trail. c. tenaya lake and tuolumne meadows trail d. el capitan trail