The Tread Life of a Particular Brand of Tire Is

question 58

Multiple Choice

The tread life of a particular brand of tire is a random variable best described by a normal distribution with amean of 60,000 miles and a standard deviation of 2900 miles. What is the probability a particular tire of thisbrand will last longer than 57,100 miles?

• A) 0.8413
• B) 0.1587
• C) 0.2266
• D) 0.7266

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Definitions:

Mixture

A combination of two or more substances where each substance retains its chemical properties.

Peanuts

Edible seeds enclosed in a hard shell, often regarded as a snack or food ingredient.

System of Linear Equations

A set of linear equations with the same variables; the solution is the set of values that satisfies all equations simultaneously.

Matrix

A rectangular array of numbers or expressions arranged in rows and columns that can be used to solve systems of linear equations, among other applications.