The manager gives some typing work to sara. She has to type an email for a customer and certain mathematical equations for a technical manual. On average, she types 35 words per minute and 2 equations per minute. The mathematical equations are to be sent to the technical team. The maximum word limit for the email is 525 words. The average length of emails sent is 140 words. The technical manual has 5 sections and each section explains a maximum of 4 equations. In the last technical manual that sara had typed, there were only 3 equations in each section.