Solve the problem.Ohm's law relates the current in a circuit, I, in amperes, the voltage of the circuit, V, in volts, and the impedance of the circuit, Z, in ohms, by the formula 
Find the current I when the impedance is 
and voltage is V = -5i volts.
A. 
amperes
B. (-40 + 15i) amperes
C. 
amperes
D. 
amperes
Answer: D
Mathematics
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Determine the coordinates of the focus and the equation of the directrix of the parabola.4y2 = x
A. F
, x = - 
B. F
, x = 
C. F
, y = - 
D. F
, x = - 
Mathematics
Rewrite the fractions using the least common denominator.
, 
, and 
A. 
, 
, and 
B. 
, 
, and 
C. 
, 
, and 
D. 
, 
, and 
Mathematics
Use the figure to answer the question.The heights (in inches) of a group of high school students are listed below in a 
plot.
Which gender has the greatest average height?
A. Male B. Female C. Both male and female have about the same average height.
Mathematics
Find a bound on the error in approximating the given definite integral using (a) the trapezoidal rule and (b) Simpson's rule with n intervals.
?
?
A. 
B. ?
C. ?
D. ?
Mathematics