Change the given quantity to the indicated unit.300 sec =  min

A. 5 
B. 12
C. 2 
D. 9 


Answer: A

Mathematics

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Find the expected value.A fair coin is tossed three times, and a player wins $3 if 3 tails occur, wins $2 if 2 tails occur and loses $3 if no tails occur. If one tail occurs, no one wins. What is the expected value of the games?

A. $0.75 B. $2.00 C. -$3.00 D. $3.00

Mathematics

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

Mathematics

Solve the problem.For what numbers ? is f(?) = csc ? not defined?

A. integral multiples of ? (180°)
B. all real numbers
C. odd multiples of  (90°)
D. odd multiples of ? (180°)

Mathematics

Determine where the function is increasing and where it is decreasing.g(x) = 6x2 + 120x + 564

A. increasing on (-?, -60) decreasing on (-60, ?) B. decreasing on (-?, -10) increasing on (-10, ?) C. increasing on (-?, -10) decreasing on (-10, ?) D. decreasing on (-?, 10) increasing on (10, ?)

Mathematics