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The amounts of time Instagram users spend on the website esch month are normally distributed with...

The amounts of time Instagram users spend on the website esch month are normally distributed with a mean of 6.7 hours and standard deviation of 1.8 hours.
a) Find the probability that a instagram user spends less than 3.6 hours on the website each month?

b) Find the probability that a instagram user spends more than 2.4 hours on the website each month. Is this an unusual event? Explain.

c) Out of 800 instagram users, about how many would expect to spend MORE THAN 2.4 hours on the website each month.?
Math   Statistics-And-Probability   
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