Answer
a) 231.6
b) 0.0085
c) 140,000
Work Step by Step
a) 5 rounds the previous 5 up to a 6.
b) zeroes before significant numbers in a number less than zero are insignificant 5 rounds the previous 4 up to a 5.
c) zeroes are insignificant; 4 does not round up, so the previous 4 remains
