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A company wants to launch a new type of battery. Their past experience has indicated that the life of the new product is approximately normally

A company wants to launch a new type of battery. Their past experience has indicated that the life of the new product is approximately normally distributed with a mean value of 150 hours and a standard deviation of 25 hours.

1. What percentage of the batteries will last over 140 hours?

2.What percentage of the batteries will last below 125 hours?

3. What percentage of the batteries will last between 145 and 155 hours?

4.90% of the batteries will last more than how many hours?

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