To convert grams to ounces using the conversion factor provided (1 g ≈ 0.035 oz), you can use the following formula:
\[ \text{ounces} = \text{grams} \times 0.035 \text{ oz/g} \]
Substituting the given value:
\[ \text{ounces} = 87 \text{ g} \times 0.035 \text{ oz/g} \approx 3.045 \text{ oz} \]
Now, rounding 3.045 to the nearest tenth gives you:
\[ 3.0 \text{ oz} \]
Thus, there are approximately 3.0 ounces in 87 grams.