(I have Finals and I really need help) A = 2, 4, 6, 8, 10 and B = 1, 2, 3, 4, 5

Find the union: A The union of B.

{7, 9}

{1, 3, 5}

{1, 2, 3, 4, 5, 6, 8, 10}

{2, 4}

An assembly consists of two mechanical components. suppose that the probabilities that the first and second components meet specifications are 0.87 and 0.84. assume that the components are independent. determine the probability mass function of the number of components in the assembly that meet specifications. x

Alake near the arctic circle is covered by a 222-meter-thick sheet of ice during the cold winter months. when spring arrives, the warm air gradually melts the ice, causing its thickness to decrease at a constant rate. after 333 weeks, the sheet is only 1.251.251, point, 25 meters thick. let s(t)s(t)s, left parenthesis, t, right parenthesis denote the ice sheet's thickness sss (measured in meters) as a function of time ttt (measured in weeks).

Pls! does anybody know a shortcut for answering these types of questions in the future?