Describe the solution set as an inequality and in interval notation. |x| < -11
A. -11 < x < 11; (-11, 11)
B. -11
C. empty set
D. the set of real numbers; (-?, ?)
Answer: C
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Solve the problem.Earth is approximately circular in cross section, with a circumference at the equator of 24,882 miles. Suppose that two ropes are used to create two concentric circles. One is created by wrapping a rope around the equator and the other is created using a rope 48 feet longer. How much space is between the ropes? Round the result to two decimal places. 
A. About 13.37 feet B. About 7.64 feet C. About 40,336.23 feet D. About 6.05 feet
Write the set in set-builder notation.The set of all calculus books
A. {x is a calculus book} B. {any calculus book} C. {x | x is a calculus book} D. {a calculus book}
Solve the problem.Amy can clean the house in 6 hours. When she works together with Tom, the job takes 4 hours. How long would it take Tom, working by himself, to clean the house?
A. 12
hr
B. 2 hr
C. 13hr
D. 12 hr
Provide an appropriate response.Using set-builder notation, a set S is written as {x ?-9 < x ? -2}. Which of the elements of the following set is not an element of S: {-3, -5, -9, -2}
A. -3 B. -5 C. -2 D. -9