Final answer:
The difference in height between 30 m down a cliff and 87 m up a cliff is 117 m. The correct answer is C. 30 - (-87) = 117.
Step-by-step explanation:
To calculate the difference in height between 30 m down a cliff and 87 m up a cliff, we need to subtract the height of going up from the height of going down. The correct answer is option C, which is 30 - (-87) = 117.
When we subtract a negative number, it is the same as adding the positive value. So, 30 - (-87) is equivalent to 30 + 87, which gives us 117.
In this case, going down the cliff is represented by the negative sign, so it is -87. Therefore, when we subtract -87 from 30, we get 117.
Height can refer to different things depending on the context. It commonly relates to vertical distance, such as the measurement from the base to the top of an object, a person, a structure, or even an abstract concept.
For instance, human height is often measured vertically from the bottom of the feet to the top of the head when standing upright.