Answer
a) atom with positive charge of 7 opposite
in integer = -7
atom with negative charge of 7
b) A deposit of $25 opposite
in integer = - $25
withdrawal of $25
c) 3,500 feet below sea level opposite
in integer = +3,500
3,500 feet above sea level
d) A rise of 45°C opposite
in integer = -45 °C
A fall of 45°C
e) A loss of 13 pounds
in integer = + 13
A gain of 13 pounds.