Which choices are correctly written in scientific notation? Check all that apply 17.1 times 10 Superscript 3 8.05 times 10 Superscript 3 6.25 times 4 Superscript 3 4 times 10 Superscript negative 16 22.09 times 10 Superscript negative 9 3.03 times 10 Superscript negative 1 5 times 10 Superscript 10 3.44 times 1 Superscript 10

How long does it take natsumi to clean up after she is done? table: .area time30. 245. 2.7560. 3.5

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.

Evaluate this using ! 0.25^2 x 2.4 + 0.25 x 2.4^2 − 0.25 x 2.4 x 0.65