What does the little v mean in maths?

What is four hundredths as a decimal? How many times did Peter deny that he knew Jesus? If one machine can complete a truckload in 2 hours and the second machine can complete a truckload in 4 hours how long would it take to complete a truckload if both machines worked on it together? Do motto's need quotation marks? What is the product of the expression -7(-3)? According to the order of operations for formulas the first expressions calculated are those within? What is the formula for finding surface area from the volume of a cube? When and why were numbers first used? What is the number of faces on any prism? What is 2794 to the nearest 10? What are all the factors of 18 and 200? Is 1.5 tons greater than 3100 pounds? What do you do if you are adding improper fractions and your fraction is improper? An important statistical effect was named for this manufacturing plant What is it? How much are taxes on 290.00 a week? Which is greater 5200 feet and 145 inches or 1 mile and 40 inches? How many pounds is 576 ounces? One dime is equal to how many dollars? What is the answer to subtract x from 4? What type of molecular structure does XeO2F2 have?