Use the imaginary unit to write the expression.- 
A. 2
B. -2
C. -2i
D. 2i
Answer: C
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Find the dimension of the object and state whether or not it is a fractal.In measuring the volume of the object, when you reduce the length of your ruler by a factor of 3 the number of length elements increases by a factor of 27.
A. The dimension is 1 and the object is ordinary (non-fractal). B. The dimension is 2 and the object is ordinary (non-fractal). C. The dimension is 3 and the object is a fractal. D. The dimension is 3 and the object is ordinary (non-fractal).
Calculate the work done by the force F along the path C.F = xyi + 4j + 8xk; C: r(t) = cos 7ti + sin 7tj + tk, 0 ? t ? 
A. W = 
B. W = 
C. W = 0
D. W = 
Suppose u and v are differentiable functions of x. Use the given values of the functions and their derivatives to find the value of the indicated derivative.u(2) = 7, u '(2) = 2, v(2) = -2, v '(2) = -4.
(uv) at x = 2
A. -24 B. -32 C. 32 D. 22
Solve the problem.Under a certain apportionment method State X receives 51 seats and State Y receives 19 seats. Ten years later, the population of State X has increased by 3%, while the population of State Y remains unchanged. Under the same apportionment method, State X now receives 50 seats and State Y receives 20 seats. This is called
A. the population paradox. B. the Alabama paradox. C. the new states paradox. D. a violation of the quota rule. E. none of these