Indi and Indrani are sisters who own a software development company. Demand has been increasing for their products and services and the sisters are contemplating whether to open up a satellite office in Austin. They estimate it would add $7 million in expenses and a profit of $12.5 million in total over the next 5 years (all other things equal). Indi and Indrani decide

open an new office because the expected marginal benefit ($12.5 million over 5 years) is greater than the estimated marginal cost ($7 million)

Explanation:

The computation is shown below;

Given that

Total marginal benefit = 12.5 million

And, the Total marginal cost = 7 million

Based on the above information

We can see that the new office should be opened as the marginal benefit would be more than the marginal cost

Therefore the first option is correct

And, the rest of the options would be incorrect

there's 11 people for the 1st position. then, no matter who gets it, there's only 10 left for the second, and then 9 left for the third. 11 x 10 x 9 = 990.   the answer is there are 990 different ways the positions can be filled by these applicants