Final answer:
To round 77.83 to the nearest whole number, we look at the digit in the tenths place (8). We round up to 78 because 8 is greater than 5.
Step-by-step explanation:
To round 77.83 to the nearest whole number, we look at the digit in the tenths place, which is 8. If the digit is 5 or greater, we round up the whole number. Otherwise, we round down. In this case, since 8 is greater than 5, we round up to 78. Therefore, 77.83 rounded to the nearest whole number is 78.