Determine the time T for every algorithm

Good evening, everyone.

I know this would be pretty easy for a lot of you, but I haven't been able to find any information, how to solve things common to this one.

• For each function f (n) (the complexity of the algorithms) and data n in the table below, determine the time t for which the algorithm will perform the calculations. We assume that the algorithms are processed on a computer capable of performing one million operations per second. You can use approximations in your answers.

I would be really greateful if anybody will explain how to solve it.

n 10 1000 1000000
lg n
n
n lg n
$$n^2$$ $$\frac{1}{10000} seconds.$$
$$2^n$$

I tried, but I'm just not sure what to do. Thank you in advance for any assistance.

In the second column, plug in $$n=10$$ into the expressions in the first column to get the number of operations. Then divide by 1000000 operations/second to get the number of seconds. Repeat for the other columns for the other values of $$n$$.
For the provided example: plugging in $$n=10$$ into $$n^2$$ yields $$10^2=100$$ operations, which takes $$\frac{100}{1000000} = \frac{1}{10000}$$ seconds.