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An unknown hydrocarbon is was burned to produce 67.69 grams of CO2 and 13.85 grams of H2O. The molecular mass is 78. What is the empirical and molecular formula?
Answered!
if the probability of hitting a target is 3/4 and 9 shots are fired independently, what is the probability of hitting the target once or not at all?
Answered!
A typical roulette wheel had 38 positions the spinning ball can land on. 18 of these positions are red. 18 of these positions are black. 2 of these positions are green.
John bets 50 on red and Mary bets 50 on black. what is the probability that both John and Mary will loose?
In Progress...
If I switched the "if statement" in the end part of the reader in the Reader-Writer problem with the signal mutex, what would happen?
In Progress...
The mean amount purchased by a typical customer at Churchill's Grocery Store is $27.50 with a standard deviation of $7.00. Assume the distribution of amounts purchased follows the normal distribution. For a sample of 68 customers, answer the following questions.

(a) What is the likelihood the sample mean is at least $30.00? Answer: 0.0016
(b) What is the likelihood the sample mean is greater than $26.50 but less than $30.00?
Answer: 0.8794
(c) Within what limits will 90 percent of the sample means occur?
Sample mean ? and ? (couldn't figure out the answer here).
In Progress...
Develop a menu-driven program that inputs two numbers and, at the user's options, find their sum, difference, product, or quotient.
Answered!
What is the difference between various market structure, i.e., perfect competition, monopolistic competition, oligopoly, etc.? How is short run equilibrium different from long run equilibrium for firms operating in each of these markets?

What are economies of scale, diseconomies of scale, constant economies of scale, external economies, and external diseconomies?

How is a natural monopoly different from a regular monopoly?

How are natural monopolies regulated?

How could you best describe “excess capacity” that firms may experience?
In Progress...
An object that has an electric charge has
an excess or deficiency of electrons
neither one
either one
an excess or deficiency of protons
In Progress...
1. How do firms determine the profit maximizing or loss minimizing level of output?
2. What is the difference between the long run and the short run in economic analysis?
3. What is the difference between the short run supply curve and the long run supply curve of a firm?
4. What is the difference between average cost and marginal cost?
5. Under what conditions would marginal cost fall or rise?
In Progress...
A 3550 mL sample of gas at 20.0 degrees C and a pressure of 650.0 torr is allowed to expand to a volume of 8.00 L. The final pressure of the gas is 32.0 kPa. What is the final temp. in degrees celsius?
Answered!
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