Solve the problem.At a fixed temperature, the resistance R of a wire varies directly as the length l and inversely as the square of its diameter d. If the resistance is 0.52 ohm when the diameter is 1 mm and the length is 260 cm, what is the resistance when the diameter is 2 mm and the length is 990 cm?
A. 0.495 ohm
B. 128.7 ohm
C. 247.5 ohm
D. 0.99 ohm
Answer: A
Mathematics
You might also like to view...
Identify the vertex of the given parabola.f(x) = 
x2
A. 
B. 
C. 
D. 
Mathematics
Factor completely.36k2 - 169m2
A. (6k + 13m)2 B. (6k - 13m)2 C. (36k + m)(k - 169m) D. (6k + 13m)(6k - 13m)
Mathematics
Multiply.8(x + 7)
A. 56x B. 8x + 8 C. 8x + 7 D. 8x + 56
Mathematics
Find 
Mathematics