Question

Please answer all three parts and show all work. Thank you! A cheap tire is said...

Please answer all three parts and show all work. Thank you!

A cheap tire is said to have its tire wear (how long it lasts (in thousands of miles as N(30,12) (that is normal with μ =30, σ =12)

Find the probability that

1. A tire last between 29,000 and 33,000 miles

2. 40% of tires last less than how many miles?

3. 45% of tires last more than how many miles?

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