This question is really hard can someone please help out? Thank you so much !!!

In the diagram, the ratio of ab to ae is (1/2) . what is the ratio of the length of to the length of ?

Asif spent $745.10 on 13 new file cabinets for his office. small file cabinets cost $43.50 and large file cabinets cost $65.95. write and solve a system of equations to find the number of small cabinets and large cabinets he purchased. determine if each statement is true or false. 1. he purchased 5 small cabinets. true or false 2. he purchased 7 large cabinets. true or false 3. he spent $527.60 on large cabinets. true or false

What is the number 321,000,000 in scientific notation? also what is the number? ?