Decide whether or not the set is closed under addition.{n ? N: n ? 27}
A. Closed
B. Not closed
Answer: B
Mathematics
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For the compound inequality, give the solution set in both interval and graph forms. 8x + 9 ? 1 or 8x + 9 ? 33
A. (-?, 3]
B. [-1, 3]
C. (-?, -1] ? [3, ?)
D. [-1, ?)
Mathematics
Solve the problem.If Emery has $1900 to invest at 5% per year compounded monthly, how long will it be before he has $2400? If the compounding is continuous, how long will it be? Round your answers to three decimal places.
A. 120.051 yr, 5.072 yr B. 0.399 yr, 0.389 yr C. 4.682 yr, 4.672 yr D. 0.056 yr, 0.467 yr
Mathematics
Identify the axis of symmetry of the parabola.y = x2 - 6x + 10
A. x = 1 B. x = 3 C. x = 0 D. x = -3
Mathematics
Perform the indicated operation. Write the answer in scientific notation.
A. 8 × 10-4 B. 4 × 102 C. 8 × 102 D. 4 × 10-4
Mathematics