Factor by grouping.6a3 - 15a2b - 8ab2 + 20b3
A. (3a2 - 4b)(2a - 5b)
B. (6a2 - 4b2)(a - 5b)
C. (3a2 - 4b2)(2a - 5b)
D. (3a2 + 4b2)(2a + 5b)
Answer: C
Mathematics
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Solve the problem.The orbit of the Syncom 3 satellite has a period of T = 1436.2 minutes. Calculate the semimajor axis of the satellite. 
and 
A. 2.751 x 106 km B. 2751 km C. 42,170 km D. 4.217 x 107 km
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Perform the indicated operations. Write the result using only positive exponents. Assume all variables represent nonzero real numbers.
A. 
B. 9x19y22
C. 9x8y8
D. 
Mathematics
Find the multiplicative inverse, or reciprocal.-7
A. 7
B. 0
C. - 
D. 
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Find the simple interest. Round your answer to the nearest cent.Principal = $900Interest Rate = 8
%Time in months = 18
A. $1336.50 B. $1113.75 C. $111.38 D. $54.00
Mathematics