Solve the problem.A class consisting of 160 students is given an exam. The first quartile for the scores on the exam is 42. This means that
A. 80 students scored 42 or higher.
B. 40 students scored 42 or higher.
C. 120 students scored 42 or higher.
D. 25 students scored 42 or higher.
E. none of these
Answer: C
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Solve the system of equations by Gaussian elimination. If there is an unlimited number of solutions, find two of them. 6x - 3y + 4z = 9 4x + 8y + 6z = 9 18x - 9y + 12z = 2
A. x = 0, y = 0, z = 0 B. x = 9, y = 9, z = 2 C. x = 3, y = 3, z = -1 D. Inconsistent
The number of homes with digital TVs is expected to grow according to the function
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where t is measured in years, with t = 0 corresponding to the beginning of 2000, and f(t) is measured in millions of homes.
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Round your answers to the nearest whole number.
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How many homes had digital TVs at the beginning of 2000?
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__________
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How many homes will have digital TVs at the beginning of 2005?
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__________
What will be an ideal response?
Provide an appropriate response.The original amount, in a subtraction problem, is called the:
A. borrowing B. minuend C. difference D. subtrahend
Find all cube roots of the complex number. Leave answers in trigonometric form.125
A. 5 cis 90°, 5 cis 210°, 5 cis 330° B. 5 cis 0°, 5 cis 60°, 5 cis 120° C. 5 cis 45°, 5 cis 165°, 5 cis 325° D. 5 cis 0°, 5 cis 120°, 5 cis 240°