Give the amplitude or period as requested.Amplitude of f(x) = 
cos 3x
A. 3
B. 
C. 
D. 
Answer: D
Mathematics
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The function s = f(t) gives the position of a body moving on a coordinate line, with s in meters and t in seconds.s = 7t - t2, 0 ? t ? 7Find the body's speed and acceleration at the end of the time interval.
A. 7 m/sec, -14 m/sec2 B. 21 m/sec, -14 m/sec2 C. 7 m/sec, - 2 m/sec2 D. -7 m/sec, - 2 m/sec2
Mathematics
Simplify.-40
A. 1 B. -1 C. 0 D. -4
Mathematics
Write the expression in standard form.(5 - 7i)(3 + 8i)
A. -71 - 61i B. 71 - 19i C. 71 + 19i D. -56i2 + 19i + 15
Mathematics
Find all the complex roots. Write the answer in the indicated form.The complex fourth roots of -16 (rectangular form)
A. 2 + i, 2 - i, -2 + i, -2 - i
B. 
+ 
i, 
- 
i, - 
+ 
i, - 
- 
i
C. 1 + i, 1 - i, -1 + i, -1 - i
D. 8
+ 8
i, 8
- 8
i, -8
+ 8
i, -8
- 8
i
Mathematics