If possible, factor the polynomial completely. If a polynomial cannot be factored, state that it is prime.4a2 - 9
A. Prime
B. (2a + 3)2
C. (2a - 3)2
D. (2a + 3)(2a - 3)
Answer: D
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Solve the problem.The world population of a certain species is evaluated at 2.3 × 106. By some projections, this population will be 6 times more important in 30 years. Express the population at that time in scientific notation.
A. 138 × 106 B. 13.8 × 107 C. 1.38 × 109 D. 1.38 × 107
Express the following in interval notation.
A. (-?, 0] ? (4, ?) B. (0, 4] C. (-?, 0) ? (4, ?) D. (-?, 0) ? [4, ?)
Solve.
= 1 - 
A. 0 B. 1 C. -6, 1 D. 12
Solve the problem.A $94,000 trust is to be invested in bonds paying 6%, CDs paying 5%, and mortgages paying 8%. The bond and CD investment must equal the mortgage investment. To earn an $6420 annual income from the investments, how much should the bank invest in bonds?
A. $29,000 B. $16,000 C. $47,000 D. $31,000