Final answer:
Leah should use grams as the unit of measurement for weighing adult rhinos at the zoo to eliminate the need for scientific notation.
Step-by-step explanation:
Leah should use grams as the unit of measurement for weighing adult rhinos at the zoo to eliminate the need for scientific notation. Grams are a smaller unit of measurement and can represent the weights of rhinos in whole numbers without the need to convert to scientific notation. For example, a rhino might weigh 2000 grams, which is a manageable number.