The laser-cooled atomic fountain clock is one of the world's most accurate clocks. If it ran for 60 million years, it would not be off by more than one second. Extremely accurate timing information is critical for such things as cell phone networks and Global Positioning Systems. The clock can be adjusted for time intervals shorter than one thousand trillionths of a second.

a. What is the decimal for 1 trillionth of a second?

b. What is the decimal for 1 millionth of a second?

Martha has a deck of cards. she has lost some of the cards, and now the deck only contains nine spades, eleven diamonds, eight clubs, and twelve hearts. martha predicts that whenever she draws a card from the deck without looking, she will draw a club one-fifth of the time. which activity would best allow martha to test her prediction? a. randomly draw a card from the box and see if it is a club. b. randomly draw a card. then, continue to draw another card until all eight clubs are drawn. c. randomly draw and replace a card 120 times. then, observe how close to 30 times a club is drawn. d. randomly draw and replace a card 100 times. then, observe how close to 20 times a club is drawn.