Solve the problem.The price p and the quantity x sold of a certain product obey the demand equation: 
What is the revenue to the nearest dollar when 400 units are sold?
A. $13,333
B. $20,000
C. $100,000
D. $66,667
Answer: A
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Solve the problem.Bengisu was pregnant 273 days and 264 days for her first two pregnancies. In order for Bengisu's average pregnancy to equal a national average of 267 days, how long must her third pregnancy last?
A. 268 days B. 242 days C. 264 days D. 269 days
Evaluate the expression for other given values of the variables.b2 - 4ac for a = 3, b = -6, and c = 6
A. -32 B. -36 C. -46 D. -42
Use properties of logarithms to condense the logarithmic expression. Write the expression as a single logarithm whose coefficient is 1. Where possible, evaluate logarithmic expressions.
(log6 x + log6 y)
A. log6 
B. log6 
+ log6 
C. log6 
D. 
Solve the problem.An object's altitude, in meters, is given by the polynomial h + vt - 4.9t2, where h is the height in meters from which the launch occurs, v is the initial upward speed in meters per second, and t is the number of seconds for which the rocket is airborne. A pebble is shot upward from the top of a building 117 meters tall. If the initial speed is 42 meters per second, how high above the ground will the pebble be after 2 seconds? Round results to the nearest tenth of a meter.
A. 220.6 meters B. 181.4 meters C. 191.2 meters D. 256.4 meters