12 darts are thrown at a dartboard. The probability of hitting a bull's-eye is 0.1. Let X be the number of bull's-eyes hit. Calculate the expected value of the given random variable X.
?
A. ?
B. 
C. 
D. 
E. 
Answer: C
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Solve the problem.On a holiday weekend, Nancy drove 1
hours in rush-hour traffic. When traffic eased up, she was able to increase her speed by 44 miles per hour and drove another 4
hours. If the entire trip was 354 miles, how fast did she drive in rush-hour traffic?
A. 27
mph
B. 27 mph
C. 28 mph
D. 26 mph
Make the following weight conversion in the U.S. system.3.9 tons to pounds
A. 3900 lb B. 62.4 lb C. 7800 lb D. 780 lb
Find an equivalent equation in rectangular coordinates.r - 5 sin ? = 6 cos ?
A. x2 + y2 = 0
B. x2 + y2 - 5y = 6x
C. 
- 5y = 6x
D. x2 + y2 + 5y = 6x
Solve the problem.A(x) = -0.015x3 + 1.05x gives the alcohol level in an average person's blood x hrs after drinking 8 oz of 100-proof whiskey. If the level exceeds 1.5 units, a person is legally drunk. Would a person be drunk after 4 hours?
A. Yes B. No