Final answer:
The ending balance of the investor's account, after accounting for a $30 capital call and a $10 distribution, is $140.
Step-by-step explanation:
To calculate the ending balance of an investor's account, you need to start with the beginning balance and then adjust for any capital calls, distributions, and profit/loss changes within the period. In this case, the beginning balance is $120. A $30 capital call, which is an additional investment requested from the investor, increases the balance, while a $10 distribution, money given back to the investor, reduces the balance. Since there are no other changes such as profit or loss, the calculation for the ending balance will be as follows:
Beginning balance: $120
+ Capital call: $30
- Distribution: $10
= Ending balance: $140