Uma pesquisa encomendada sobre a preferência entre rádios numa determinada cidade obteve o seguinte resultado:
50 pessoas ouvem a rádio Riograndense.
27 pessoas escutam tanto a rádio Riograndense quanto a rádio Gauchesca.
100 pessoas ouvem apenas uma dessas rádios.
43 pessoas não escutam a rádio Gauchesca.
O número de pessoas entrevistadas foi:
a) 117
b) 127
c) 147
d) 177
e) 197​

An air conditioning system can circulate 350 cubic feet of air per minute. how many cubic yards of air can it circulate per minute?

Cody started biking to the park traveling 15 mph, after some time the bike got a flat so cody walked the rest of the way, traveling 4 mph. if the total trip to the park took 6 hours and it was 46 miles away, how long did cody travel at each speed? solve using rate times time= distance

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.