9. The formular for finding the area of an object is
A. Length + Width
B. Length - Width
C. Length : Width
D. Length x Width
E. 2 (Length + Width)
ans​

D. length × width

Explanation:

eg. 30 cm(length) × 20cm(width) = 600cm²

introduction of a drug directly into the respiratory tract is a form of inhalation administration.

in chemistry, a solution’s concentration is how much of a dissolvable substance, known as a solute, is mixed with another substance, called the solvent. the standard formula is c = m/v, where c is the concentration, m is the mass of the solute dissolved, and v is the total volume