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Let the number of thymine bases be \(x\). According to the ratio:
\frac{5}{3} = \frac{15}{x}
To solve for \(x\), cross-multiply:
5x = 15 \times 3
Calculate the right side:
5x = 45
Now, divide both sides by 5 to solve for \(x\):
x = \frac{45}{5} = 9
Thus, there are \(\boxed{9}\) thymine bases.
A physicist working on particle collisions finds that the ratio of protons to neutrons in a certain isotopic sample is $2:1$. If there are 8 protons, what is the total number of nucleons (protons and neutrons) in the sample?