Use the quadratic formula to find all real solutions of the equation.
A. 
B. 
C. 
D. 
E. no real solutions
Answer: A
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Solve the problem.If a resistor and inductor are connected in series to a battery of emf ?, the current in the circuit is given by 
where ? is the time constant of the circuit, R is the resistance, and t is the time since the circuit was closed. Find the expression for dI/dt.
A. - 
et/?
B. 
e-t/?
C. 
e-t/?
D. 
Determine whether the polynomial is a perfect square trinomial, a difference of squares, or neither.x2 + 30x + 225
A. Perfect square trinomial B. Neither C. Difference of squares
Describe the given set of points with a single equation or with a pair of equations.The plane through the point (-9, -8, -9) and perpendicular to the x-axis
A. x = -9 B. -9 + y + z = 0 C. y + z = -17 D. y = -8 and z = -9
Find the vector projv u.v = 2i - 2j - 4k, u = 12i - 5k
A. 
i - 
k
B. 
i - 
j - 
k
C. 
i - 
k
D. 
i - 
j - 
k