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 years. The blood
Pressure readings were given to the nearest whole number. Approximately what percentage of the people aged
25-40 had a systolic blood pressure reading between 110 and 139 mm Hg inclusive?
Systolic Blood Pressure for People Aged 25-40 Years 
Definitions:
Nasopharynx
The upper part of the throat located behind the nose, connecting the nasal cavity to the throat and playing a role in respiration and vocalization.
Epiglottis
A flap of cartilage located at the root of the tongue, which is depressed during swallowing to cover the opening of the windpipe.
Thyroid Cartilage
The largest cartilage of the larynx, forming the Adam's apple, which protects the vocal cords.
Cricoid Cartilage
A ring-like structure located at the top of the trachea below the thyroid cartilage, providing support and structure to the airway.
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