What are the 3 pledges?

What is the area of a circle when the radius is 8.1cm? Does a negative affects whether or not a number is a rational number? How do you Swich to algebric expression 500 less than the product of 4 and a number? In a circle whose diameter is 20in and a chord is 6in from the center what is the length of the chord? What is thirteen and fifty seven hundredths plus eight and forty nine hundredths? How many gallons of water does a 15'x42 pool hold? What is the absolute value of real numbers? What is the missing number in the sequence 1427 3125? What is the Roman numeral for 1019? What is the perimeter of a right angle triangle when one side is 10.5 cm greater than the other side and has an hypotenuse of 25.5 cm? What are two lines called that are the same distance apart at any point? When was the Hindu Arabic number system invented? How much 2 yards in feet? 90 percent of what number is 36? What is 8.54 round to the nearest tenth? At which point is an investigator most likely to use deductive reasoning? Is 5x - 5 a linear equation? Is a triangle a polygon with 3 sides? How many significant numbers are in 2.501 x 10? What is the simplest form of twelve fourths?