Solve the problem.A coil of wire rotating in a magnetic field induces a voltage given by e = 20 sin 
,where t is time in seconds. Find the smallest positive time to produce a voltage of 10
.
A. 2.8 sec
B. 3 sec
C. 2.8? sec
D. 3? sec
Answer: B
Mathematics
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Factor completely. If unfactorable, indicate that the polynomial is prime.3x2 - 3
A. 3(x + 1)(x - 1) B. 3(x - 1)2 C. 3(x + 1)2 D. prime
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Find the domain of the function 
a. (–?, ?)
b. 
c. [–3, –2]
d. [2, 3]
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Perform the indicated operations and write the result in standard form.(
)(
)
A. -45i B. -45 C. 45 D. 45i2
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Simplify.42 + 92
A. 169 B. 52 C. 97 D. 26
Mathematics