Express the sum using summation notation.5 +  +  + ... + 

A.
B.
C.
D.


Answer: C

Mathematics

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Is the number 20,160 prime or composite? Explain.?

A. ?It is prime, because it is odd. B. ?It is prime, because the sum of the digits is not divisible by 3 or 9 and it is odd. C. ?It is composite, since the sum of the digits is divisible by 7. D. ?It is composite, since it is divisible by 7 and 11. E. ?It is composite, since 7 and 13 are factors.?

Mathematics

Solve the problem.Ms. Patterson proposes to give her daughter Claire an allowance of $0.20 on the first day of her 14-day vacation, $0.40 on the second day, $0.80 on the third day, and so on. Find the allowance Claire would receive on the last day of her vacation.

A. $2.80 B. $3276.80 C. $1638.40 D. $8192.20

Mathematics

Determine the value of x or ? as requested. Round results to an appropriate number of significant digits.Determine the value of x.

A. 22.7 m B. 4.9 m C. 11.8 m D. 9.3 m

Mathematics

Perform the indicated operation.Express  as a power of 2.

A. 22 B. 2-6 C. 2-2 D. 2-4

Mathematics