Calculate the cause-specific death rates for measles and tuberculosis using the provided data and formula.

The population at risk for measles deaths in children is the total number of children less than 5 years.

$$\text{Measles Death Rate} = \frac{\text{Number of children who died of measles}}{\text{Total children less than 5 years}} \times k$$ $$\text{Measles Death Rate} = \frac{3}{490} \times 1000$$ $$\text{Measles Death Rate} = \frac{3000}{490}$$ $$\text{Measles Death Rate} \approx 6.1224$$

Rounding to two decimal places:

$$\text{Measles Death Rate} \approx 6.12 \text{ per } 1000 \text{ children less than 5 years}$$

The cause-specific death rate for measles is $\boxed{6.12 \text{ per } 1000}$.

The population at risk for tuberculosis deaths in adults is the total adult population.

$$\text{Tuberculosis Death Rate} = \frac{\text{Number of deaths from tuberculosis}}{\text{Total adults}} \times k$$ $$\text{Tuberculosis Death Rate} = \frac{7}{739} \times 1000$$ $$\text{Tuberculosis Death Rate} = \frac{7000}{739}$$ $$\text{Tuberculosis Death Rate} \approx 9.4722$$

Rounding to two decimal places:

$$\text{Tuberculosis Death Rate} \approx 9.47 \text{ per } 1000 \text{ adults}$$

The cause-specific death rate for tuberculosis is $\boxed{9.47 \text{ per } 1000}$.