First, write the value(s) that make the denominator(s) zero. Then solve the equation.
+ 8 = 
A. x ? 0; 
B. x ? 0; 
C. x ? 0, 4; 
D. No restrictions; 
Answer: B
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Find the flux of the vector field F across the surface S in the indicated direction.F = 3xi + 3yj + zk; S is portion of the plane x + y + z = 8 for which 0 ? x ? 3 and 
direction is away from the origin
A. 0 B. 180 C. 480 D. 240
Solve the problem.A simple electrical circuit consists of a resistor connected between the terminals of a battery. The voltage V (in volts) is dropping as the battery wears out. At the same time, the resistance R (in ohms) is increasing as the resistor heats up. The power P (in watts) dissipated by the circuit is given by P = src="https://sciemce.com/media/4/ppg__tttt0610191239__f1q35g5.jpg" style="vertical-align: -17.0px;" /> 
. Use the equation 
= 
+ 
to find how much the power is changing at the instant when R = 4 ohms, V = 3 volts, 
and 
A. -2.19 watts
B. -2.31 watts
C. 2.19 watts
D. 2.31 watts
Determine if the given set of whole numbers is closed under addition.{n ? N|n ? 48}
A. Not closed B. Closed
Determine the equation of the line described. Put answer in the slope-intercept form, if possible.Through (7, -6), perpendicular to 5x + 6y = -1
A. y = 
x
B. y = - 
x + 
C. y = 
x + 72
D. y = 
x - 