How big is 13ft in m?

What is the percent of error of 2.5? Who devised the caratesian coordinate system? What measurement would you use to measure the length of a fish in a aquarium? What does b equal in -7b equals 84? What is the three segments that connect 3 non collinear points? What quadrilateral always has 4 right angles? Can you give me some REAL world examples? What is the answer to 7x20? Square root of 2 over square root of 13? What is the antonym of allegedly? What is a five sided figure that is not a pentagon? How is image sharpness increased on radiograph? What to say when a girl asks why do you like me? What is 15 percent of 36 months? What is 65758 multiplied by 10000 in standard form? What does semi-abstract in math mean? How many different five digit numbers can you make using 1 2 3 4 6? Why are tables in a spreadsheet better than tables in a word processor? What does hgal mean on your water bill? What is 78 percent of 938?