Suppose you purchase one ABC May 75 (exercise price = 75) call contract quoted at $8.50 and write one ABC May 80 (exercise price = 80) call contract quoted at $6. If, at expiration, the price of a share of ABC stock is $79, your profit would be __________. 

A cube of ice is taken from the freezer at 0o C and placed in a Styrofoam container filled with 1100 g of water at 22o C. The final situation is observed to be all water at 19o C in thermal equililbrium.  What was the mass of the ice cube in kg?   and c = 4190) Round to the thousandths place.

An investor buys a call option that has an option premium of $5 and a strike price of $22.50. The current market price of the stock is $25.75. At expiration, the value of the stock is $23.00. The net profit/loss of the call position is closest to:

What Fahrenheit temperature is 148 K?

The writer of a put option __________. 

Buyers of listed options __________ required to post margins and writers of listed options __________ required to post margins. 

At what cold reservoir temperature in Kelvin would a Carnot engine with a hot reservoir temperature 225 K have an efficiency of 20%?

An ideal gas initially at a temperature of 395 K undergoes an isobaric expansion at 5000 Pascals. If the volume increases from 2.5 m3 to 4 m3 and 18,000 J of heat is transferred to the gas, what is the change in its internal energy in Joules?

Which of the following is the riskiest single-option transaction?

A refrigerator requires 25 J of work and exhausts 125 J of heat per cycle. What is the coefficient of performance, K, of the refrigerator?