Answer: Hello there! 
We have the number 58.6, and we want to round it to the nearest whole number, where a whole number is a number that only has zeros after the decimal point. 
suppose that we have the number x.y where the dot is a decimal point. 
if y is a number between 0 and 4, we need to round down; then the rounded whole number is x 
if y is a number between 5 and 9, we need to round up, now our number will be (x +1) 
In this case, we have 58.6 
the number after the decimal point is 6, then we need to round up: 
now we have: 58 + 1 = 59