What is the circumference of a pizza if the diameter is 16 inches?

How do you write fifty three billion two million one hundred sixteen thousand seven in standard form? What is a parallelogram is both rhombus and rectangle? What are the measures to promote secularism? Names of shapes with 4 sides here? Scott is standing 80 ft from the base of a tree He sees the top of the tree from an angle of elevation of 42 degrees His eye is 4.5 feet off the ground How tall is the tree? What does the abbreviation Mg mean in the metric system? If average height for women is normally distributed with a mean of 65 inches and a standard deviation of 2.5 inches then approximately 95 percent of all women should be between what and what inches? What is the best way to smooth a straight or convex edge? What is a ratio of 2 integers where the denominator is not equal to 0? What is 17 over 13 as a mixed number? What is the roman numeral for 74? How many mls is 1.7ccs? Is there any application of differentiation in statistics? What is 0.853 rounded to the nearest ten? How many lines of symmetry do crayfish have? Is 5 divisible? What are the first ten trianguler numbers? Tessellations that use more than one type of regular polygon are called regular tessellations.? If you were born on Jan 1966 how old are you? What is the definition of factor in maths terms?