Find all specified roots.Seventh roots of 1.

A. 1, cis , cis , cis , cis , cis , cis 
B. -1, cis , cis , cis , cis , cis , cis 
C. 1, cis , cis , cis , cis , cis , cis 
D. 1, cis , cis , cis , cis , cis , cis , -1

Answer: C

Mathematics

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A. - 
B. - 
C. - 
D. - 

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Factor completely, or state that the polynomial is prime.7x2 + 78x + 11

A. prime B. (7x - 1)(x - 11) C. (7x + 1)(x + 11) D. (7x + 11)(x + 1)

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Find the required ratio.Power (in watts) is defined as the ratio of the work done (in joules) to the time required to do the work. If an engine performs 4340 joules of work in 25 seconds, find the power developed by the engine, correct to the nearest watt.

A. 175 W B. 0 W C. 10 W D. 174 W

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Find the product.(x - 4.7)(9x + 0.4)

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