Atriangle is placed in a semicircle with a radius of 7mm , as shown below. find the area of the shaded region. use the value 3.14 for pi , and do not round your answer. be sure to include the correct unit in your answer.

Astandard deck of cards contains 52 cards. one card is selected from the deck. (a) compute the probability of randomly selecting a diamond or heart. (type an integer or a decimal rounded to three decimal places as needed.) (b) compute the probability of randomly selecting a diamond or heart or club. (type an integer or a decimal rounded to three decimal places as needed.) (c) compute the probability of randomly selecting queen or club. (type an integer or a decimal rounded to three decimal places as needed.)