Venus1324 y r u deleting my questions

Arestaurant with food revenue of $500,000 and a cost of food of $100,000 has a food cost ratio of 0.2. true false

Need some ! asap i need to figure out 3 major changes in bridges over time and why these changes to adapt to both improvements in technology and changing social links would also alot.

Answer quickly will mark as brainliest . what type of sculptures were created by the olmecs? how did they get the materials needed to make the sculptures?