Find the expected value.Suppose that 1,000 tickets are sold for a raffle that has the following prizes: one $300 prize, two $100 prizes, and one hundred $1 prizes. What is expected value of a ticket?
A. $300
B. $0.60
C. $1
D. $100
Answer: B
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Solve the problem.At lift-off, a rocket weighs 40.3 tons, including the weight of fuel. It is fired vertically, and the fuel is consumed at the rate of 2.16 tons per 1,000 ft of ascent. How much work is done in lifting the rocket to an altitude of 10,000 ft?
A. 5.11 x 105 ft?ton B. 2.95 x 105 ft?ton C. 3.31 x 105 ft?ton D. 3.49 x 105 ft?ton
Solve the problem.Sue drove her car 304 miles in January, 351 miles in February, and 485 miles in March. If her average mileage for the four months from January to April is to be at least 389 miles, how many miles must she drive in April?
A. at least 416 miles B. at most 389 miles C. at most 416 miles D. at least 382 miles
Solve the problem.Tom sleeps an average of 8.29 hours a day. In one non-leap year, how many hours does Tom sleep?
A. 431.08 hours B. 2989.35 hours C. 3067.3 hours D. 3025.85 hours
Solve the problem.Volatility refers to:
A. the amount of uncertainty or risk about changes in a security's value B. the likelihood that a security's value will only decrease in value C. a security's value as compared to an industry benchmark D. the likelihood that a security's value will only increase in value