Compute the dot product u ? v.u = 
, v = 
A. 225
B. 30
C. -195
D. 255
Answer: D
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Find the expected value.A fair coin is tossed three times, and a player wins $3 if 3 tails occur, wins $2 if 2 tails occur and loses $3 if no tails occur. If one tail occurs, no one wins. What is the expected value of the games?
A. $0.75 B. $2.00 C. -$3.00 D. $3.00
Use a graphing utility to find the equation of the line of best fit. Round to two decimal places, if necessary.
A. y = -6.2x + 140.4 B. y = 6.2x - 140.4 C. y = 6.8x - 150.7 D. y = -6.8x + 150.7
Solve the problem.Halley's comet has an elliptical orbit with the sun at one focus. Its orbit shown below is given approximately by 
In the formula, r is measured in astronomical units. (One astronomical unit is the average distance from Earth to the sun, approximately 93 million miles.) 
Find the distance from Halley's comet to the sun at its shortest distance from the sun. Round to the nearest hundredth of an astronomical unit and the nearest million miles.
A. 12.03 astronomical units; 1119 million miles B. 6.02 astronomical units; 559 million miles C. 5.5 astronomical units; 511 million miles D. 64.11 astronomical units; 5963 million miles
Determine the equation of the given line, as well as the slope of the line. If the slope is undefined, state this.
A. x = -4, m: undefined B. y = x - 4, m = 0 C. y = -4, m: undefined D. y = x - 8, m = 1