Solve the polynomial inequality and graph the solution set on a number line. Express the solution set in interval notation.x2 + 7x ? -12
A. (-?, 3] ? [4, ?)
B. (3, 4)
C. [3, 4]
D. [-4, -3]
Answer: D
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Match the surface show below to the graph of its level curves.
A. 
B. 
C. 
D. 
Solve.At Allied Electronics, production has begun on the X-15 Computer Chip. The total revenue function is given by 
and the total cost function is given by 
where x represents the number of boxes of computer chips produced. The total profit function, P(x), is such that 
Find P(x).
A. P(x) = -0.3x2 + 54x - 15 B. P(x) = 0.3x2 + 49x - 45 C. P(x) = 0.3x2 + 54x - 30 D. P(x) = -0.3x2 + 49x + 15
Evaluate the function for the given values of a and b. Then use the intermediate value theorem to determine which of the statements below is true.a = -2 and b = -1f(x) = 6x4 + 2x3 - 2x - 7
A. f(-2 ) and f(-1) have opposite signs, therefore f does not have a real zero between -2 and -1. B. f(-2 ) and f(-1) have opposite signs, therefore f has a real zero between -2 and -1. C. f(-2 ) and f(-1) have the same sign, therefore the intermediate value theorem cannot be used to determine whether f has a real zero between -2 and -1. D. f(-2 ) and f(-1) have the same sign, therefore f does not have a real zero between -2 and -1.
How many factors are in the expression? (a + b) (c + d)
A) 2 B) 4 C) 3 D) 1 E) 6