Round 77.682517 to four figures

77.68

Explanation: 77.682517

Well ok so how many sig figs are to the left of the decimal? 2

7 and 7.

We got two down, two more to go.

How many sig figs do we need? 4.

Ok, so 6 and 8 are sig figs because they are whole numbers and not zeros. We need 4 sig figs.

77.68! BUT hold on, we need to still round our answer.

We look to the right of the two and determine if we need to round and we don't. 2 is too low so we keep 68 the same.

i dont know yhat awnser

Explanation: