Benchmark 12B
Habits of Mind: Computation and Estimation
Grades 9-12, page 291

Use ratios and proportions, including constant rates, in appropriate problems.

NSES Content Standard A 
Science as Inquiry: Abilities necessary to do scientific inquiry
Grades 9-12, page 175
Use technology and mathematics to improve investigations and communications. A variety of technologies, such as hand tools, measuring instruments, and calculators, should be an integral component of scientific investigations. The use of computers for the collection, analysis, and display of data is also a part of this standard. Mathematics plays an essential role in all aspects of an inquiry. For example, measurement is used for posing questions, formulas are used for developing explanations, and charts and graphs are used for communicating results.