What is a positive and negative interface of Apple, Microsoft, Linux GUI

Cengagenowv2 is a comprehensive online learning tool. using cengagenowv2, you may access all of the following except: 2. each time you log in, cengagenowv2 automatically performs a system check and informs you if your computer does not meet the cengagenowv2 system requirements. 3. which tab/page allows you to easily track your assignment scores, number of submissions, time spent, as well as the ability view assign

Melissa needs to add a topic to an email that she will send to her teacher. choose the name of the field where she should type her topic.

Whats three fourths of 15(this is supposed to be in math but i clicked too fast)