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PREP07 Test 2	70, 75, 80, 85, 90, 105, 105, 130, 130, 130 The list shown consists of the times, in seconds, that it took each of 10 schoolchildren to run a distance of 400 meters. If the standard deviation of the 10 running times is 22.4 seconds, rounded to the nearest tenth of a second, how many of the 10 running times are more than 1 standard deviation below the mean of the 10 running times?
Ready4	Similarities across 200 genes related to hearing and deafness that were discovered in new research have yielded proof of echolocation capabilities in cetaceans, including dolphins, that were evolving independently of but convergent with the sonar hearing capabilities for which bats are well-known.
Ready4	Last year the rate of unemployment was 8.2 percent, but this year it has been 7 percent. We can conclude that unemployment is on a downward trend and the rate will be even lower next year. Which of the following, if true, most seriously weakens the conclusion above?
Ready4	If $n = 3\cdot 4\cdot p$ , where $p$ is a prime number greater than 3, how many different positive non-prime divisors does $n$ have, excluding 1 and $n$ ?
190113 还原机经选题: 文字题&几何	The face values of paper money are different, but the thickness of these paper money is the same. The thickness of the paper money with total value of $ 10,000 is 35 feet 10 inches when paper money with only face value of $20 are stacked. What is the height in feet when paper money with only face value of $50 are stacked to get total value of $6000000000? (1 feet = 12 inches)
Ready4	Two rectangular table tops have equal area. If the first table top is 6 feet by 18 feet and the second table top is 9 feet wide, what is the length of the second table top, in feet?
Ready4	S = {2, 3, 4, 6} T = {2, 3, 4, 6} Two integers will be randomly selected from the sets above, one integer from set S and one integer from set T. What is the probability that the product of the two integers will equal 12?
OG15 OG16 OG17 OG18 OG19 OG20 OG2022	Each year for 4 years, a farmer increased the number of trees in a certain orchard by $$\frac{1}{4}$$ of the number of trees in the orchard the preceding year. If all of the trees thrived and there were 6,250 trees in the orchard at the end of the 4-year period, how many trees were in the orchard at the beginning of the 4-year period?
Ready4	In recent years, some painters of graffiti have been winning recognition as artists. But since graffiti is vandalism, painting graffiti is inherently an act of rebellion and lawbreaking. For this reason, painting graffiti is not art. Which of the following is an assumption that supports drawing the conclusion above from the reason given for that conclusion?
Ready4	Although the candidate's approval rating is at an all-time low, his remarks aired in tonight's press conference seem like it is suggestive that his bid for reelection, previously thought improbable, is all but inevitable.
Ready4	With broad, flat bodies and small heads, the cockroach's durability is to the insect world what the honey badger is to the mustelids.
Ready4	A hotel manager will select 1 of 10 eligible families to receive a free night’s stay and 2 of 15 eligible families to receive a free dinner in the hotel’s restaurant. If none of the families is eligible to receive both free services, how many different ways are are there of selecting 3 families to receive a free service?
	In Country X, a ballroom is classified as Category C if it has a ceiling of at least 10 meters. In the graph, each of the 22 Category C ballrooms is represented by two points arranged vertically: one representing the comparison of the height of the ballroom's ceiling to the number of tiles in the ballroom area (black circles), the other representing the comparison of the height of the ballroom's ceiling to the mean length per tile in the ballroom area (red squares). Based on the given information, use the drop-down menus to most accurately complete the following statements about Category C ballrooms in Country X. A) The ballroom with the greatest mean length per ballroom tile has a ceiling height meters. B) There is a correlation between the number of ballroom tiles and the mean length per ballroom tile.
OG17 OG18	The chart depicts the organizational structure of the government of City C. Currently, 5 departments report directly to the City Manager, and each department consists of 2–5 agencies. Due to budgetary concerns, the government will be restructured as follows. The Human Resources Department and its agencies will be eliminated. Payroll will be moved to the Finance Department where it will be part of a single agency created by consolidating Accounting and Collections; Building Maintenance responsibilities will be transferred to Engineering. The Police and Fire Departments will be consolidated into a single department, and Prevention and Suppression will be merged into a single agency of that consolidated department.From the drop-down menus, select the options that create the most accurate statement based on the information provided.2A. As a result of the restructuring, a total of departments will report to the City Manager, and the maximum number of agencies per department will be
Ready4	The company was convinced that the design of the new 3-D television should be such that the picture quality and 3-D effect would appear the same to someone not wearing an auxiliary headset as a person wearing traditional 3-D glasses.
PREP07 Test 2	The distributor of cases of a certain beverage charges $60 per case for orders of 1 to 5 cases, $50 per case for orders of 6 to 20 cases, and $45 per case for orders of more than 20 cases. If the distributor filled three orders, one for 3 cases of the beverage, one for 11 cases of the beverage, and one for 30 cases of the beverage, what was the total amount the distributor charged for the orders?
Ready4	City budget advisor: If Thomaston wants to decrease its unemployment rate, it should lower the minimum wage, so companies can hire more employees. Records from neighboring cities show that whenever the minimum wage is lowered, within three years the city’s unemployment rate decreases by 1 to 2 percent. Which of the following would it be most helpful to know in order to assess the city budget advisor’s suggestion?
OG17 OG18	In New Zealand, the grape is a long-established crop, but the truffle—an edible fungus that grows on the roots of certain trees—became a commercial crop in the 1980s. The graph represents projected cumulative net income for grape and truffle crops through the end of the year, in thousands of New Zealand dollars per hectare (NZ$1,000/ha), for each of the first 11 years since planting. Cumulative net income is equal to total revenue from crop sales for the years since planting minus total investment costs over those same years.From each drop-down menu, select the option that creates the most accurate statement about these projections based on the given information.A. Cumulative net income from truffles is least at the end of the year since planting.B. If cumulative net income for grapes continues to grow at the same rate as in years 8 through 11 since planting, the cumulative net income from grapes for the 12th year since planting will be approximately NZ$ per hectare.
Manhattan	Studies have shown that an automobile that runs on a blend of 85% ethanol/15% gasoline gets better mileage than an otherwise similar car equipped with a gasoline engine. Many American legislators have concluded that an increase in tax incentives for ethanol production would lessen our dependence on foreign oil.Which of the following, if true, casts the most doubt upon the validity of the legislators' conclusion?
PREP07 Test 2	The table shows the quantities of eggs, flour, and sugar used by a certain baker to make one cake of each of the three different types. If the baker had 24 eggs, 30 cups of flour, and 10 cups of sugar available and had to make 2 angel food cakes and 1 devil's food cake, what is the maximum number of pound cakes that the baker could make with the remaining ingredients?