How many years in a billon seconds?

Is sum of two integers is equal to the difference of the same two integers? What does an open dot on an line graph mean? Is iv Roman number 5? 5000 plus 1000? Can a circle with a line through it mean square feet? How many minutes are in a degree of trigonometry? What is -3x plus 9? 6.9 meter is what centimeter? How many hours in 5 million seconds? How do you calculate the area of part of a circle? What is 260 divided by 10? 16.50 per hour is how much a year? How do you find the degree of a monomial? Do octagons have all equal sides? What is the lowest common denominator of 5 9 and 16? Is the number 105 Composite prime neither? What is 40x200? How much is 69.00 plus tax? How do you graph -2y equals 6? Which is bigger 4000 yards or 3 miles?