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 = 
. Use the equation
= 
+
src="https://sciemce.com/media/4/ppg__as0610191803__f1q87g5.jpg" style="vertical-align: -17.0px;" /> 
to find how much the power is changing at the instant when R = 4 ohms, V = 3 volts, 
and dV/dt = -0.04 volts/sec.
A. 1.06 watts
B. 1.19 watts
C. -1.19 watts
D. -1.06 watts
Answer: C
Mathematics
src="https://sciemce.com/media/4/ppg__as0610191803__f1q87g5.jpg" style="vertical-align: -17.0px;" /> to find how much the power is changing at the instant when R = 4 ohms, V = 3 volts, and dV/dt = -0.04 volts/sec.
A. 1.06 watts
B. 1.19 watts
C. -1.19 watts
D. -1.06 watts
Answer: C
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Calculate the area of the surface S.S is the portion of the plane 4x + 5y + 2z = 2 that lies within the cylinder 
A. 6
?
B. 2?
C. 12
?
D. 6
Solve the proportion.
= 
A. 
B. 
C. 
D. 
Use the information given about the angle ?, 0 ? ? ? 2?, to find the exact value of the indicated trigonometric function.cos ? = - 
, 
< ? < ?Find cos(2?).
A. 
B. - 
C. - 
D. 
Solve the problem.The charges for renting a moving van are $65 for the first 30 miles and $8 for each additional mile. Assume that a fraction of a mile is rounded up. Find a symbolic representation for a function f that computes the cost of driving the van x miles, where 
(Hint: express f as a piecewise-constant function.) Then, determine the cost of driving the van 90 miles.
A. f(x) = 
; $6330
B. f(x) = 
; $545
C. f(x) = 
; $1025
D. f(x) = 
; $1025