write an integer to represent each situation.

a) Britney earned $75 last week
b) It was fourteen degrees celsius below zero
c) The frightened boy took 2 steps back
d) The helicopter rose to an altitude of 1500m

a) To represent Britney's earnings of $75 last week, we can use the integer 75.

b) To represent the temperature of fourteen degrees celsius below zero, we can use the integer -14. The negative sign indicates that the temperature is below zero.

c) To represent the frightened boy taking 2 steps back, we can use the integer -2. The negative sign indicates the direction of the movement, which is backward.

d) To represent the altitude of the helicopter rising to 1500m, we can use the integer 1500. The absence of any signs indicates a positive value, indicating the upward movement of the helicopter.