How many tens in 805?

What is the difference between 2950 m and 2550 m expressed in meters? What is the circumference of a D battery? What is the length of an arc with a radius of 5 and the central angle is 120 degrees? What do the 5 sides of the pentagon mean? How do you get set 3 and 4 and the rest of the techies? Can twentynine over thirtysix be simplified? What does these roman numerals equal MMCDXX? How do you know a number is odd? What is the answer to 162 plus 81? Is metroplex bigger than omega supreme? Is 45 in the 3 times table? What is 250cm in feet and inches? What is the probability of getting one prime number when rolling two dice? How many cups would fit stacked in a space 1 meter in height? Who were the members of the small faces? How long will it take to drive 12 miles going 65 miles per hour on a freeway? How many quarters does it take to make eight dollars? What the relationships between cylinder and prism? How many minutes are there in 0.19 hours? What is 1and 1 tenth in fraction?