Question

Quick Start Company makes 12-volt car batteries. After many years of product testing, the company knows that the average life of a Quick Start battery is normally distributed, with a mean of 45.1 months and a standard deviation of 6.2 months.

A) What percent of Quick Start batteries last less than 40.4 OR more than 42.7 months?
%. Keep your answer in percentage of 2 decimal places.


B) What percent of Quick Start batteries last no more than 52 OR not less than 65.4 months?
%. Keep your answer in percentage of 2 decimal places.


C) What percent of Quick Start batteries last no more than 59.1 OR more than 72.9 months?
%. Keep your answer in percentage of 2 decimal places.


D) What percent of Quick Start batteries last less than 67.4 OR not less than 68.9 months?
%. Keep your answer in percentage of 2 decimal places.

Answer 1