Solve the problem.The resistance of a wire varies directly as the length of the wire and inversely as the square of the diameter of the wire. A 20 foot length of wire with a diameter of 
has a resistance of 
What would the resistance be for a 
length, with diameter 
of the same kind of wire ?
A. 473 ohms
B. 492 ohms
C. 480 ohms
D. 477.5 ohms
Answer: C
Mathematics
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Find the extreme values of the function and where they occur.y = 
A. Local maximum at (-1, 0), local minimum at (1,0). B. None C. Local maximum at (1, 0), local minimum at (-1, 0). D. Local maximum at (0, -1).
Mathematics
Graph.
- 
= 1
A. 
B. 
C. 
D. 
Mathematics
Solve the right triangle. If two sides are given, give angles in degrees and minutes.
a = 17.3 cm, b = 21.6 cmRound the missing side length to one decimal place.
A. A = 38°42'; B = 51°18'; c = 27.7 cm B. A = 53°13'; B = 36°47'; c = 27.7 cm C. A = 38°42'; B = 51°18'; c = 29.4 cm D. A = 53°13'; B = 36°47'; c = 25.8 cm
Mathematics
Express the following in interval notation.{x|-5 < x}
A. (-?, -5) B. [-5, ?) C. (-5, ?) D. (-?, -5]
Mathematics