How many unique ways are there to arrange the letters in the word OPAL?

What does 512162 round to the nearest ten? What is one third of twelve and why? What is an object thats a cylinder? What is -6(2y-4)? How do you get maths buddy answers? Does Sqrt3 over 3 equal 1 over sqrt3? How would you find the length of a table? How many times 2 can be subtracted from 32? What is 0.499 in a percentage? What do you call the lines characterized by sharp turns from one direction to other? What is the lower measurement to carats that diamonds are found in? Nations with three dots in a row? How do you write 213 in word form? Mrs.coopers fifth grade class has 11 more girls than boys there are 35 students in all how many girls are there? What 3 things does a polygon have? What is the mean of 12 24 and 52? Is water tank a cuboid? What is a example of an irrational number? How many 4 foot X 3 foot of pallets fits in 24' trucks? Is 0.9 or 0.2 the number closest in value to 0.1?