SECTION 5.1 Introduction to Normal Distributions and the Standard Normal Distribution 245 Finding Probability In Exercises 47-56, find the indicated probability using the standard normal distribution. If convenient, use technology to find the probability. 47. P(z 2.175) 50. P(z > -1.85) 51. P(-0.89 2.58) 56. P(z 1.32) I Extending Concepts 57. Writing Draw a normal curve with a mean of 60 and a standard deviation of 12. Describe how you constructed the curve and discuss its features. 58. Writing Draw a normal curve with a mean of 450 and a standard deviation of 50. Describe how you constructed the curve and discuss its features