A nurse measured the blood pressure of each person who visited her clinic. Following is a relative-frequency histogram for the systolic blood pressure readings for those people aged between 25 and 40. Use the histogram to answer the question. The blood pressure readings Were rounded to the next higher whole number. 
Given that 800 people were aged between 25 and 40, approximately how many had a systolic Blood pressure reading greater than 120 and less than or equal to 140?
Definitions:
Settlement House
A community center providing educational, recreational, and other social services to individuals, especially immigrants, in urban neighborhoods.
World War I
A global conflict that took place primarily in Europe from 1914 to 1918, involving most of the world's great powers and marking the end of empires.
Glass-Steagall Banking Act
A law enacted in 1933 to establish the Federal Deposit Insurance Corporation (FDIC) and introduce banking reforms to control speculation.
Investment Banking
A sector within banking that deals with the creation of capital for other companies, governments, and other entities, through underwriting or acting as the client's agent in the issuance of securities.
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