How do you spell out 5.3 billion?

What is the circumference of the circle whose equation is (x-9)2 (y-3)264? What is one of the ten tough facts that leaders had to face in combat? Is it never always or sometimes the sum of two positive integers is zero? What is the partial product of 100? The depth of a lake at a center point which is a function of the distance of that point from shore? 27 plus 78 plus 56 plus 12 plus 57 plus 95 plus 63-13-58-8 equals? What is considered to be measurable and countable? What is it called in art a line that is drawn to show the edge and surface ridges of an object? Do supplementary angles have to be obtuse? What is a significant amount? How do you find the circumcenter of a obtuse triangle step by step? Why must you write the amount of a check in both numerals and words? Who is called Babuji? What decimal has a repeating pattern? How many square feet are in an area 104 by 104 feet? How do you write 59811 in word form? What number is in the middle of 50000 and 80000? Is the square root of 79 a rational number? How do you type the exponent sign from the keyboard? What part of the a quadratic formula tells you when the quadratic equation can be solved by factoring?