What percentage of the time does the amount of rainfall in April exceed 4.5 inches?

Let Z be the standard normal random variable. What is P(Z>0.38)?
2.Let Z be the standard normal random variable. What is P(Z>-2.38)?
3.Let Z be the standard normal random variable. Find z so that the area to the left of z is 0.3156.
4.Let Z be the standard normal random variable. Find z>0 so that the area between -z and +z is 0.95.
5.Assume the average amount of precipitation in a town of Texas, during the month of April is 4.0 inches (the World Almanac, 2000). Assume that a normal distribution applies and that the standard deviation is 0.5 inches. What percentage of the time does the amount of rainfall in April exceed 4.5 inches?
6.Assume the average amount of precipitation in a town of Texas, during the month of April is 4.0 inches (the World Almanac, 2000). Assume that a normal distribution applies and that the standard deviation is 0.5 inches. What percentage of the time does the amount of rainfall in April be less than 4.5 inches?
7.Let Z be the standard normal random variable. What is P(-1.98

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