Last year the amounts of electricity an electric company supplied to 4,117 residential properties and 2,504 commercial properties were recorded to the nearest thousand kilowatt-hours and summarized in the graph shown. The median of the amounts of electricity recorded is In which of the following categories?
At a certain used-book store, the cost of each paperback book is x dollars and the cost of each hardcover book is y dollars. What is the cost of a hardcover book at the store?
(1)
At the store, the cost of 3 paperback books and 5 hardcover books is $12.25.
(2)
At the store, the cost of 9 paperback books and 15 hardcover books is $36.75.
For any data set, the proportion of data that lies within A" standard deviations of its mean is at least 1 - -K. The scores on a spelling test taken by 64 students have a mean of 74.0 and a standard deviation of 6.0. If t\$ the number of students who have scores greater than 62 and less than 86, and t\s as small as possible, what is the value of t?
Each element in A belongs to C.
Each element in D belongs to B.
A port city needed to deepen its 5,000-foot-long and 75-foot-wide shipping channel from a depth of 15 feet to a depth of 25 feet. The dirt that was removed from the channel was shipped to a landfill, which accepted 735,000 cubic feet of the dirt. Approximately what percent of the dirt that was removed from the channel was accepted by the landfill?
Beginning at noon yesterday, water was removed from a partially filled water tank at a constant rate of 300 liters per hour. When there were 600 liters of water left in the tank, no more water was removed from the tank. Were there more than 1,000 liters of water in the tank at noon yesterday?
(1) There were 600 liters of water in the tank at 2:00 yesterday afternoon.
(2) There were more than 650 liters of water in the tank at 1:00 yesterday afternoon.
Christa, Jada, and Yvette were swimming laps at an outdoor swimming pool. Christa planned to swim for Cm minutes at a constant speed and swim a total of t~. laps. Jada planned to swim for Jm minutes at a constant speed and swim a total of Jt laps. Yvette planned to swim for Y„ minutes at a constant speed and swim a total of Yi laps. They started swimming at the same time and stopped swimming at the same time when lightning began to occur. If Christa lost 40% of her planned swimming time, which of the 3 swimmers lost the greatest percentage of her planned laps?
What is the value of n ?
(1) Twice n equals n plus 8.
(2) n times n equals 8n.
In a study examining the neural pathway linking audtory perception to motor skills, brain scans of study participants who were tone-deaf—those unable to differentiate between or produce sounds of various pitches—revealed many fewer fibers on the arcuate fasciculus, the pathway connecting the frontal and temporal lobes, than there were In a control group of non-tone-deaf people. In 90 percent of the tone-deaf participants, researchers could not detect the superior branch of the arcuate fasciculus. The researchers concluded that they had found the anatomical cause of tone deafness.
Which of the following would, if true, indicate a major flaw in the researchers' reasoning?
According to the passage, Karev's hypothesis suggests which of the following
about people's choices of seating in movie theaters?
