Final answer:
The up multiplier in the binomial model can be calculated using the formula Up Multiplier = e^(Volatility * Square Root of Time Step). In this case, the up multiplier is approximately 1.047. Therefore, the correct option is c. 1.047.
Step-by-step explanation:
In the binomial model, the up multiplier can be calculated using the formula:
Up Multiplier = e^(Volatility * Square Root of Time Step)
In this case, the volatility is 55% and the time step is 5 days. Therefore, the up multiplier can be calculated as:
Up Multiplier = e^(0.55 * sqrt(5))
Using the calculator, the up multiplier is approximately 1.047.