The Maximum Level of Lead Allowed in Drinking Water Is $\mu$

question 47

Multiple Choice

The maximum level of lead allowed in drinking water is 15 $\mu$ g/kg. What is this concentration in units of parts per million?

• A)15 ppm
• B)1.5 × 10^-2 ppm
• C)1.5 × 10⁴ ppm
• D)3.1 ppm

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Definitions:

Contrapositive

In logic, a statement formed by negating both the hypothesis and conclusion of the converse of a conditional statement and reversing their order.

Relationship

The method of connection between two or more concepts, objects, or people, or the circumstance of being in such connection.

Contrapositives

Statements that reverse and negate both the hypothesis and conclusion of another statement to form a logical equivalence.

Obverses

The front or more important side of a coin, medal, or seal, often featuring the head or primary design.