Anna drove at a constant rate of 63 miles per hour for 3.2 hours. she determined she drove 201.6 miles .which best explains the reasonableness of Anna's answer.

Ateacher wanted to buy a chair, a bookshelf, two tables and a desk. she spent $900 for all five items and the chair and the desk combined 70% of her total. if the bookshelf cost $50, how much did each of the tables cost?