03- para ladrilhar totalmente uma parede de 27m por 2de área foram usadas peças quadradas de 15 cm de lado. Quantas pecas foram usadas ?
04- uma metalúrgica utiliza chapas de aço quadradas de 1m de lado para recortar 30 cm de lado . Ao sair da máquina, da chapa original sobre uma parte que é reaproveitada posteriormente. Quantos cm2 de chapa são reaproveitados?

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.