Help please ! The sphere’s radius (r) is...
A. (3V/4pi)1/3
B. (4V/3pi)1/3
C. (3pi/4V)1/3

Free points also plz look my profile and answer really stuff

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?

Select the correct answer and solve for y