To round 585.99936 to the nearest tenth, follow these steps:
Identify the tenth place: In the number 585.99936, the tenth place is the first digit after the decimal point, which is 9.
Look at the hundredth place: The digit in the hundredth place (the second digit after the decimal point) is 9.
Apply rounding rules: Since the digit in the hundredth place (9) is greater than or equal to 5, you round the tenth place up by 1.
Final rounded result: The tenth place (9) becomes 6, so the number rounds to 586.
Thus, 585.99936 rounded to the nearest tenth is 586.