If the Pollution of Lake Erie Were Stopped Suddenly, It

question 81

Multiple Choice

If the pollution of Lake Erie were stopped suddenly, it has been estimated that the level y of pollutants would decrease according to the formula y = y _o e ^-0.3937t , where t is the time in years and y _o is the pollutant level at which further pollution ceased. How many years would it take to clear 59% of the pollutants?

• A)t = 0.98 years
• B)t = 1.34 years
• C)t = 2.02 years
• D)t = 2.26 years
• E)t = 0.58 years

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Definitions:

Endocrine Organ

Glands in the body that release hormones directly into the bloodstream to regulate various bodily functions.

Subcutaneous Layer

The layer of tissue directly under the skin, consisting of fat and connective tissue, providing insulation and energy storage.

Adipose Tissue

A type of connective tissue that stores fat and provides insulation and cushioning for the body.

Epidermis

The outermost layer of cells in plants and animals, serving as a protective barrier against environmental damage.