3.14159
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The thirty-second digit of pi following the decimal point is a 0. If you include the 3 at the front, the thirty-second digit of pi is 5.
To round 7.7 to the nearest decimal place, you would look at the digit in the second decimal place, which is 7. Since this digit is 5 or greater, you would round up the digit in the first decimal place by adding 1. Therefore, 7.7 rounded to the nearest decimal place would be 7.8.
5.99
3.14159
84.10