Final answer:
The question relates to the field of Physics and involves calculating a change in voltage by multiplying the two provided numbers, which results in a product related to velocity or an electrical potential difference.
Step-by-step explanation:
The question asks about calculating the change in voltage (V) using the provided equation and substituting the given values into it. In this case, using the provided equation where the change in V at -9.8 multiplied by 2.99 is sought. By simple multiplication, this value can be calculated as -9.8 * 2.99. This describes a physics problem that might be dealing with electrical circuits or motion under the influence of gravity, based on the context of the surrounding information.