Solve the problem.Light bulbs are often wired so that electricity can flow through either bulb, as illustrated in the accompanying figure. 
In this way, if one bulb burns out, the other bulb still works. If two light bulbs have resistances T and S,their combined resistance R is R = 
Evaluate the formula when T = 200 and S = 250. Round to the nearest hundredth.
A. R = 0.01
B. R = 166.67
C. R = 55.56
D. R = 111.11
Answer: D
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Solve the problem.Find the derivative of the function 
at the point 
in the direction in which the function decreases most rapidly.
A. -
B. -
C. -
D. -3
Solve the problem.The line segment joining the origin to the point (3, 2) is revolved about the x-axis to generate a cone of height 3 and base radius 2. Find the cone's surface area using the parametrization x = 3t, y = 2t, 
A. 2
B. 2?
C. 6?
D. 3?
Find the median of the random variable x with the probability density function defined on the indicated interval I. The median of x is defined to be the number m such that 
. Observe that half of the x-values lie below m and the other half lie above m. Round the answer to two decimal places, if necessary.
?
; 
What will be an ideal response?
Find the solution set for the equation.|7x + 4| = |7x - 4|
A. {0, 4} B. ? C. {0} D. {0, 7}