What is the ealiest known reference tp pi in history in 1352?

Can you think of one real world example of when the concept of functions might be useful with architects? What is 240 0.25? What is the mass of a cloud? Which of these cities Dusseldorf Utrecht Dortmund Stuttgart is the odd one out? What is remainder of 93 diveded by 5? How many minuets are in three fourths of an hour? How many rotational symmetries does a seven pointed star have? What is two eighths equivalent to? What is the Hindu Arabic numeral system? What is 7671000000 called? What digit would be in the million place of a number that is greater than 999999 but less than 2000000? What is 0.47 as fraction in lowest terms? What is mean by Directional distribution factor? What is the perfect square of 400? What is the square rout of 21? What is the difference between inequality and unequal? Is x equals 1 a function? What is the sum of 5 feet 9 inches and 12 feet inches? What is 9 halves to 28? Is forty three an even number true or false?