Solve the problem.Suppose that the demand function for x units of a certain item is 
where p is the price per unit, in dollars. Find the marginal revenue.
A. 
= 100 + 
B. 
= 100 + 
C. 
= 
D. 
= 
Answer: A
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Find the missing number, if possible. There may be more than one number that works, so find as many as possible. If no number works, write "No number possible."
+ 6 = 7
A. 1 B. -13, 13 C. -1, 1 D. 13
Fill in the blank with one of the words or phrases listed below.
The 6 above is called the 
.
A. quotient B. factor C. product D. sum
Use Descartes' Rule of Signs and the Rational Zeros Theorem to find all the real zeros of the polynomial function. Use the zeros to factor f over the real numbers. f(x) = 2x4 - 5x3 + 9x2 - 15x + 9
A. -3, -1, 1, - 
; f(x) = (x - 1)(2x + 3)(x + 1)(x + 3)
B. 1, 
; f(x) = (x - 1)(2x - 3)(x2 + 3)
C. 3, 
; f(x) = (x - 3)(2x - 3)(x2 + 1)
D. -3, -1, 1, 
; f(x) = (x - 1)(2x - 3)(x + 1)(x + 3)
Hooke's law states that the magnitude of force, F, required to stretch a spring x units beyond its natural length is directly proportional to x. If a force of 3 pounds stretches a spring from its natural length of 10 inches to a length of 10.7 inches, what force will stretch the spring to a length of 11.5 inches? Round your answer to the nearest hundredth.
A. 
B. 
C. 
D. 
E. 
?