Find the unknown number in the proportion. Round answer to the nearest hundredth when necessary.
= 
A. x = 410.67
B. x = 0.14
C. x = 11.7
D. x = 4.3
Answer: C
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Calculate the circulation of the field F around the closed curve C.F = xyi + 4j , curve C is r(t) = 4 cos ti + 4 sin tj, 0 ? t ? 2?
A. 8
B. 
C. - 
D. 0
Perform the indicated exponentiation.(-3)2
A. -6 B. 6 C. -9 D. 9
Use a graph to estimate the solution.The value, v, in hundreds of dollars, of Juan's computer is approximated by 
where t is the number of years since he first bought the computer. Graph the equation and use the graph to estimate the value of the computer 6 years after it was purchased.
A. $880 B. $1300 C. $700 D. $400
Write the phrase as a variable expression. Use x to represent "a number."Nine times the sum of a number and -40
A. 9+ x + (-40) B. 9x + (-40) C. 9[x + (-40)] D. 9x - (-40)