Use the Empirical Rule to Solve the Problem

question 37

Multiple Choice

Use the empirical rule to solve the problem.
-The amount of Jen's monthly phone bill has a roughly bell-shaped distribution with a mean of $57 and a standard deviation of $9. What percentage of her phone bills are between $30 and $84?

• A)99.7%
• B)95%
• C)99.99%
• D)68%

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Definitions:

Plant Hormones

Chemical substances produced in plants that regulate growth, development, and responses to environmental stimuli.

Organic Molecules

Compounds containing carbon that are typically found in living systems, including proteins, lipids, carbohydrates, and nucleic acids.

Alternation of Generations

A lifecycle in certain plants and algae that alternates between a sexual phase (gametophyte) and an asexual phase (sporophyte).

Gametophytes

Gametophytes are the sexual phase in the life cycle of plants and algae, producing gametes for fertilization.