Can someone me with answering questions 3, 6, and 7? (most preferably 6 and 7) asap! !

What is the purpose of the sinuses? to enhance the loudness of the voice to moisten and warm inhaled air to filter out foreign particles from the air to increase the weight of the skull

The high temperature in rockport over the weekend was 55(1/4) °f. write this temperature value as a decimal number with two decimal places. the decimal form of °f is

Discuss how seniors can combat health problems they may face.