Answer:
52.5
Explanation:
Tenths are the first decimal place to the right of the decimal.
Rounding to the nearest tenth means you have to look at the hundredth place, which is seven.
The rule is if your place value is five or more, you race the value up.
So rounding four up will be five
Lastly, get rid of any other place values on the right of your place
Therefore, your new number is 52.5