With regard to drug disposition, which of the following statements is correct?

In pharmacokinetics, a compartment is best defined as a group of tissues or organs that exhibit identical kinetic behavior. This implies that these tissues or organs have the same: 

After oral administration, the apparent volume of distribution of the drug was determined to be 55 L. This value suggests the following interpretation:

Regarding mean residence time (MRT), which of the following statements is correct? 

For a drug whose disposition kinetics are best described by a one-compartment model with first-order elimination, which of the following statements is correct when the dose is increased?

For the kinetic scheme provided, wherein K01, K02 and K03 represent zero-order rate constants and k1, k2, k3, k4 and k5 denote first-order rate constants, derive the rate expressions for each compartment; specifically, formulate dA/dt, dB/dt and dC/dt. (6 pts total; 2 pts each)

When selecting the most appropriate pharmacokinetic model based on goodness-of-fit criteria, the F-test is employed to:

About 20% of customers at a restaurant leave a tip over 20%. If 10 customers are randomly selected, what is the expected number who will leave a tip over 20%?

The direct write-off method:

Which of the following is recorded with a debit to Cash and a credit to Notes Receivable?