Diane scored 74% on the test meaning she earned 74% of the possible points on the test. There were 100 possible points on the test so she earned 100 x 0.74 = 74 points. Each question is worth 2 points so she got \( \frac{74}{2} \) = 37 questions right.

The factors of a number are all positive integers that divide evenly into the number. The factors of 28 are 1, 2, 4, 7, 14, 28.

To fill a 20 gallon tank exactly halfway you'll need 10 gallons of fuel. Each fuel can holds 2 gallons so:

cans = \( \frac{10 \text{ gallons}}{2 \text{ gallons}} \) = 5

To divide fractions, invert the second fraction and then multiply:

\( \frac{4}{7} \) ÷ \( \frac{4}{7} \) = \( \frac{4}{7} \) x \( \frac{7}{4} \)

To multiply fractions, multiply the numerators together and then multiply the denominators together:

\( \frac{4}{7} \) x \( \frac{7}{4} \) = \( \frac{4 x 7}{7 x 4} \) = \( \frac{28}{28} \) = 1

The number of students taking German or Spanish is 11 + 8 = 19. Of that group of 19, 6 are taking both languages so they've been counted twice (once in the German group and once in the Spanish group). Subtracting them out leaves 19 - 6 = 13 who are taking at least one language. 26 - 13 = 13 students who are not taking either language.