Solve the problem.In 1990 the number of factory pollution incidents reported in Country X was 4300. This number had decreased roughly at a rate of 660 per year since 1982. (i) Find an equation of a line 
that describes this data, where y represents the number of pollution incidents during the year x. (Answers may vary.) (ii) Estimate the year when there were approximately 7740 incidents.
A. y = -660(x - 1990) + 4300; 1985
B. y = -660(x - 1982) + 4300; 1977
C. y = -4300(x - 1990) + 660; 1980
D. y = -660(x - 1988) + 4300; 1983
Answer: A
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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) = 8, u '(2) = 2, v(2) = -1, v '(2) = -5.
(2u - 4v) at x = 2
A. 20 B. 24 C. 12 D. -16
Write the word phrase as an algebraic expression. Use x to represent the unknown number.The quotient of 35 and a number
A. 
B. x - 35
C. 
D. 35 - x
Determine from the graph whether the function has any absolute extreme values on the interval [a, b].
A.
| Absolute minimum only. |
B. Absolute maximum only.
C. Absolute minimum and absolute maximum.
D. No absolute extrema.
Solve the system.2x + 4y + 8z = 168 x + 2y + 4z = -28 x + y + z = -6
A. (-5, -2, -6) B. (-6, -5, -2) C. (-6, -2, -5) D. No solution