Test the vector field F to determine if it is conservative.F = -cos x cos yi + sin x sin yj - sec2 zk
A. Not conservative
B. Conservative
Answer: B
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Let A = {1, 3, 5, 7}B = {5, 6, 7, 8}C = {5, 8}D = {2, 5, 8}U = {1, 2, 3, 4, 5, 6, 7, 8}.Determine whether the statement is true or false.C ? A
A. False; C has one different element than A does. B. False; C is equal to A. C. True D. False; A is a subset of C.
Match the graph to the function listed whose graph most resembles the one given.
A. linear function B. constant function C. reciprocal function D. absolute value function
Solve the problem.Use the formula L = 10 ? log 
, where the loudness of a sound in decibels is determined by I, the number of watts per square meter produced by the soundwave, and 
A certain noise produces 6.35 × 10-4 W/m2 of power. What is the decibel level of this noise?
A. 203 dB B. 78 dB C. 88 dB D. 9 dB
Find the mean of the random variable x associated with the probability density function over the indicated interval.
?
; 
?
A. ?
B. ?
C. ?
D. ?
E. 