18sqrt(x)
I'm assuming that 3(sqrt(x))5 is equal to 15sqrt(x). If that is the case, just perform the multiplication within each term and treat the sqrt(x) as a variable when you add the all together. It is okay because they are like terms.
Answer: 8
Step-by-step explanation:
Given
Money deposited 
Interest rate 
Time period 
For a year simple and compound interest is the same

Thus, interest earned is 8 units
Answer:
47
Step-by-step explanation: