Find the magnitude and direction angle (to the nearest tenth) for each vector. Give the measure of the direction angle as an angle in [0,360°].
A. 
; 345°
B. 15; 105°
C. 15; 345°
D. 
; 285°
Answer: A
Mathematics
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Simplify by writing the expression with positive exponents. Assume that all variables represent nonzero real numbers.
-4
A. 
B. 
C. 
D. 
Mathematics
Simplify the factorial expression.
A. n + 6! B. (n + 5)! C. 1 D. 6!
Mathematics
Perform the indicated operations. Express the answer as a single polynomial in standard form.9x7(-12x + 2)
A. -90x7 B. -108x + 18 C. -108x8 + 18x7 D. -108x8 + 2
Mathematics
The loudness of a sound of intensity x, measured in watts per square meter, is defined as L(x) = log (
), where xo = 10-3.A particular Boeing 747 jetliner produces noise at a loudness level of 113 decibels. Find the intensity level (round to the nearest hundredth) in watt per square meter for this noise.
What will be an ideal response?
Mathematics