Solve.Gary has to choose between two calling plans for his local phone service. Plan A charges a monthly fee of $30 regardless of how many local calls are placed. Plan B charges $15 per month plus $0.50 for each local call placed. Express each plan's price structure, y, in terms of number of calls placed, x.
A. Plan A: y = 30x
Plan B: y = 0.50x + 15
B. Plan A: y = 30
Plan B: y = 0.50x + 15
C. Plan A: y = 15
Plan B: y = 0.50x + 30
D. Plan A: y = 30
Plan B: y = 15x + 0.50
Answer: B
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Write the negation of the proposition.Susie lives in a green house.
A. Billy lives in a green house. B. Susie lives in a blue house. C. Susie does not live in a green house. D. Susie does not live in a house that is not green.
Provide an appropriate response.Determine whether a linear or quadratic function would be a more appropriate model for the graphed data. If linear, tell whether the slope should be positive or negative. If quadratic, decide whether the coefficient of x2 should be positive or negative. DENTAL FLOSS USE 
Years since 2000
A. Linear; positive B. Quadratic; positive C. Linear; negative D. Quadratic; negative
Solve the problem. Assume projectile is ideal, launch angle is measured from the horizontal, and launch is over a horizontal surface, unless stated otherwise.A baseball is hit when it is 3.4 ft above the ground. It leaves the bat with an initial velocity of 
at a launch angle of 23°. At the instant the ball is hit, an instantaneous gust of wind blows against the ball, adding a component of -13.5i (ft/sec) to the ball's initial velocity. How high does the baseball go? Round your answer to the nearest tenth.
A. 54.7 ft B. 46.8 ft C. 50.2 ft D. 52.2 ft
Verify the identity.
= 
What will be an ideal response?