Why did most ancient cultures primarily write out their mathematical texts in words?

Suppose the radius of a circle is 16. what issuppose the radius of a circle is 16. what is its circumference its circumference

The management of a supermarket wants to adopt a new promotional policy of giving a free gift to every customer who spends more than a certain amount per visit at this supermarket. the expectation of the management is that after this promotional policy is advertised, the expenditures for all customers at this supermarket will be normally distributed with a mean of $95 and a standard deviation of $20. if the management wants to give free gifts to at most 10% of the customers, what should the amount be above which a customer would receive a free gift?

Determine which postulate or theorem can be used to prove that lmn =nmo