Find the equation of the tangent line at the given point on the curve.xy2 = 4; (4, 1)
A. y = - 
x + 
B. y = -2x + 9
C. y = - 
x + 3
D. y = -8x + 33
Answer: A
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Complex numbers are used in electronics to describe the current in an electric circuit. Ohm's law relates the current in a circuit, I, in amperes, the voltage of the circuit, E, in volts, and the resistance of the circuit, R, in ohms, by the formula 
Solve the problem using this formula.Find E, the voltage of a circuit, if I = (8 + 3i) amperes and R = (5 + 3i) ohms.
A. (31 - 39i) volts B. (39 + 31i) volts C. (39 - 31i) volts D. (31 + 39i) volts
Find the exact area of the circle.
A. 81? sq ft B. 324? sq ft C. 20.25? sq ft D. 972? sq ft
Solve the problem.In a biology experiment, a scientist collected 8237 mosquitoes in a field and 5684 mosquitoes in an urban area. How many mosquitoes did she collect altogether?
A. 2553 mosquitoes B. 3590 mosquitoes C. 13,574 mosquitoes D. 13,921 mosquitoes
Evaluate the following expression.
?
?
A. 
B. 
C. 
D. 
E. 