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The time spent (in...

The time spent (in days) waiting for a heart transplant in Ohio and Michigan for patients with type A+ blood can be approximated normal with a mean of 91 days and a standard deviation of 10 days..

a) What is the shortest time spent waiting for a heart that would still place a patient in the top 30% of waiting times?

b) What is the shortest time spent waiting for a heart that would still place a patient in the bottom 10% of waiting times?

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