Solve the problem.Find the equilibrium point for the given supply and demand functions. Here p represents price and x represents quantity.
A. (28, $840)
B. (30, $1920)
C. (16, $1920)
D. (30, $660)
Answer: C
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A. I B. II C. III D. IV
Determine whether it is true or false that the given number is a solution of the equation.48; 
= -4
A. True B. False
Find different polar coordinates (r, ?) for the same point under the given conditions.
, r < 0 and 0 < ? < 2?
A. 
B. 
C. 
D. 
A store manager wants to know the demand y for an energy bar as a function of price x. The daily sales for three different prices of the energy bar are shown in the table. Price, x $0.94 $1.21 $1.55 Demand, y 490305340? ? (i) Use the regression capabilities of a graphing utility to find the least squares regression line for the data.(ii) Use the model to estimate the demand when the price is $1.38. Round your answer to the six decimal places. ?
A. (i) 
; (ii) 374.134036
B. (i) 
; (ii) -453.157181
C. (i) 
; (ii) 542.199365
D. (i) 
; (ii) -453.157181
E. none of the above