Algebra 1

We can make the ratio equal each other because the ratios between the model and the full-scale library must be equal on both sides. Thus we get, $\frac{8}{100} = \frac{x}{35}$ Cross multiple $8 \times 35 = 100 \times x$ $280=100 x$ Divide both sides by 100 $\frac{280}{100}=\frac{100 x}{100}$ $x=2.8$ The answer is 2.8 which is option G.