Final answer:
The expression 7g + 3.5 is factored by -0.25 to get -0.25(-28g - 14), with roundings not applicable in this algebraic context.
Step-by-step explanation:
To factor out -0.25 from the expression 7g + 3.5, we need to find common terms that can be divided by -0.25. So, we rewrite each term as a multiple of -0.25:
-0.25 x (-28g) + -0.25 x (-14) = -0.25(-28g - 14)
The factored expression is -0.25(-28g - 14).
Remember to always round the final answer to the same precision as the least precise measurement when dealing with numbers that represent physical quantities. In this case, since we are only factoring an algebraic expression and not performing any measurement-based calculations, rounding does not apply.