Use the result ei? = cos ? + i sin ? to plot the complex number.-3e(?i)/2
A. 
B. 
C. 
D. 
Answer: D
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Round the amount to the nearest dollar.$99,246.13
A. $99,246.1 B. $99,247 C. $99,000 D. $99,246
Find the net cost equivalent and the percent form of the single discount equivalent for the following series discount.25/20
A. 0.55; 45% B. 0.4; 60% C. 0.45; 55% D. 0.6; 40%
Simplify where possible. Then solve the equation.9 - 5 = 2r
A. r = 
B. r = 0
C. r = 2
D. r = 
Solve the problem.The concentration of alcohol in a person's blood is measurable. Suppose that the risk R (given as a percent) of having an accident while driving a car can be modeled by the equation R = 5ekxwhere x is the variable concentration of alcohol in the blood and k is a constant.(a) Suppose that a concentration of alcohol in the blood of 0.07 results in a 12% risk 
of an accident. Find the constant k in the equation.(b) Using this value of k, what is the risk if the concentration is 0.012?(c) Using the same value of k, what concentration of alcohol corresponds to a risk of 100%?(d) If the law asserts that anyone with a risk of having an accident of 12 or more
should not have driving privileges, at what concentration of alcohol in the blood should a driver be arrested and charged with a DUI? What will be an ideal response?