Key definition:
the four types of agglomeration economics
Resources Vs Market oriented firms
central park theory
labor pooling
urban utility curve
In: Economics
In: Civil Engineering
How can a hotel sales representative identify who is responsible for purchasing meeting space, banquets, and rooms for corporate travelers in the corporate headquarters of an insurance company?
In: Accounting
When Susan rides her bike, the distance that she travels varies directly with the amount of time she is biking. Suppose she bikes 50 miles in 2.5 hours. At this rate, how many hours would it take her to bike 80 miles?
In: Physics
In: Statistics and Probability
Suppose one gallon of gasoline produces 1.1 × 108 J of energy, and this energy is sufficient to operate a car for twenty miles. If a 309 mg drop of gasoline could be converted completely into thermal energy, how many miles could the car go with that energy?
In: Physics
The distance between major cracks in a highway follows an exponential distribution with a mean of 21 miles. Given that there are no cracks in the first five miles inspected, what is the probability that there is no major crack in the next 5 mile stretch? Please enter the answer to 3 decimal places.
In: Statistics and Probability
1. There are 9 members on a board of directors. If they must form a subcommittee of 6 members, how many different subcommittees are possible?
60,480
720
84
531,441
2. A card is drawn at random from a well-shuffled deck of 52 cards. What is the probability of drawing a face card or a 5?
16
3. A pitching machine throws 70% strikes and 30% balls.
Five pitches will be thrown by the machine.
What is the probability the machine will throw one ball and four
strikes?
0.3 × 0.74
0.3 + 4 × 0.7
5 × 0.3 × 0.74
none of these
4. Suppose that A, B are two independent events, with
P(A) = 0.1 and P(B) = 0.2.
Find P(A or B).
0.15
0.02
0.30
0.28
In: Statistics and Probability
4. you are trying to develop a strategy for investing in two different stocks. The anticipated annual return for a $1,000 investment in each stock under four different economic conditions has the following probability distribution:
| Probability | Economic Condition | Return Stock X | Return Stock Y |
| 0.1 | Recession | −100 | 50 |
| 0.3 | Slow growth | 0 | 150 |
| 0.3 | Moderate growth | 80 | -20 |
| 0.3 | Fast growth | 150 | -100 |
a. Expected return for stock X and for stock Y.
b. Standard deviation for stock X and for stock Y.
c. Covariance of stock X and stock Y.
d. Would you invest in stock X or stock Y? Explain
In: Economics
Suppose the installation time in hours for a software on a laptop has probability density function f(x) = (4/3) (1 − x3 ), 0 ≤ x ≤ 1.
(a) Find the probability that the software takes between 0.3 and 0.5 hours to be installed on your laptop.
(b) Let X1, . . . , X30 be the installation times of the software on 30 different laptops. Assume the installation times are independent. Find the probability that the average installation time is between 0.3 and 0.5 hours. Cite the theorem you use.
(c) Instead of taking a sample of 30 laptops as in the previous question, you take a sample of 60 laptops. Find the probability that the average installation time is between 0.3 and 0.5 hours. Cite the theorem you use.
In: Math