2017-08-13 287阅读
Question #1: The population of the city of Boston was 520,000 in 2005. Assume the population grows at a constant rate of 7% per year. Which of the following is an expression for the population of Boston in the year 2010?
(a) 520,000(1.07)4 (b) 520,000(1.07)6 (c) 520,000(1.07)5 (d) 520,000(1.17)1/5 (e) 520,000(1.17)5
Question #2: What is the real value of x in the equation log345 - log35 = log7x?
(a) 49 (b) 16 (c) 5 (d) 7 (e) 81
Question #3: What is the length of the segment BD in the figure below, if AD is 5 inches? Figure not drawn to scale
(a) 6 (b) 7 (c) 8 (d) 10 (e) 12
Question #4: Which of the following graphs could be the correct representation of 2 functions f(x) and g(x) that satisfy the equation g(x) = - f(-x)?
(a) (b) (c) (d)
Question #5: The price of wheat was $5/bushel on January 2007 and $9/bushel on January 2008. By what percentage did the price change from January 2007 to January 2008?
(a) 80%
(b) 90%
(c) 40%
(d) -40%
(e) 50%
Question #6: If 5y + 3x = 4, what is the value of 15y + 9x?
(a) 11 (b) 12 (c) 13 (d) 14 (e) 15
Question #7: The number of real solutions of the equation sin(x) = cos(x) + 2 is:
(a) 1 (b) 2 (c) 3 (d) The equation does not have any real solutions (e) The equation has an infinity of real solutions
The 2 functions never intersect each other because while they both can reach the value 1, they don’t do it at the same x.
Sin(x) is 1 for multiples of �/2 while Cos(x) + 2 is 1 for multiples of �. (d) is the correct answer. �
Question #8: What is the value of the sum of angles a and b in the figure below? (a) 120o (b) 200o (c) 220o (d) 240o (e) 260o
a + b = 180o - angle(CBA) + 180o - angle(ACB). a + b = 360o - 120o. a + b = 240o. �
Question #9: If a,b and c are consecutive integers, a < b < c, and a + b + c = 96, what is the value of b?
(a) 30 (b) 31 (c) 32 (d) 33 (e) 34
Answer: If a, b and c are consecutive numbers, b = a + 1 and c = a + 2. Then, a + a + 1 + a + 2 = 96, so 3�a + 3 = 96. a = (96 - 3)/3 = 31. b = a + 1 = 32.
Question #10: Suppose f(x) = x3 + 1 and g(x) = |x - 5|, what is f(g(1))?
(a) 23 (b) 24 (c) 65 (d) 55 (e) 81
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