Write the integer that represents the opposite of each situation. Explain what zero means in each situation.

a. 100 feet above sea level

b. 32°C below zero

c. A withdrawal of $25

The correct answers are:

a) - 100

b) + 32

c) + 25

Step-by-step explanation:

a) The integer that represents '100 feet above sea level' is + 100. The opposite integer is - 100. In this case zero means sea level, so:

above sea level the quantities are positive below sea level the quantities are negative

b) The integer that represents '32°C below zero' is - 32. The opposite integer is + 32. In this case zero means 0°C which is the water melting temperature (temperature when water passes from solid to liquid), so:

above zero the quantities are positive below zero the quantities are negative

c) The integer that represents 'a withdrawal of $25' is - 25. The opposite integer is + 25. In this case zero means no entrances and no withdrawals, so:

entrances are positive withdrawals are negative