Solve.A credit company allocates 8-digit account numbers such as 1122-3421 where the digits 1 through 9 are used. How many different account numbers can there be?
A. 220,345
B. 43,046,721
C. 13,440
D. 40,320
Answer: B
Mathematics
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is integrated twice term by term, for what value(s) of x does the new series converge?
A. 0 ? x < 2 B. 0 ? x ? 2 C. 0 < x < 2 D. 0 < x ? 2
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A. 16 B. -14 C. 14 D. -16
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