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Welcome to MATH Magazine’s Numbers in the News! Each week we'll post a math question based on a current news story. Read and solve the question.

If you like, enter your answer in the Comments section. The first person to answer the question correctly has the honor of being our “Winner of the Week.” (We’ll reveal that person, and the correct answer, in that question’s Comments the following week.)

What are you waiting for? Start solving!


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Katrina, Five Years Later

Five years ago this week, Hurricane Katrina devastated the city of New Orleans and the surrounding region. Since then, residents have moved back, houses have been rebuilt, restaurants, hotels, and stores have reopened, and billions of dollars have been spent, but there is still a lot of work to be done. New Orleans Mayor Mitch Landrieu thinks that it will take another five years to fully recover from the damage. The strength of a hurricane is calculated by the Saffir-Simpson Scale. The scale goes from 1 to 5, with 5 being the strongest winds. Look up the Saffir-Simpson Scale. Hurricane Katrina was a Category 5 storm. What is the minimum wind speed for that category? What are the ranges for the other categories?