B. / 2 NI 7. Divide by 9 A. 1 C.; D. 2 8. Divide 8.4 by 3. A. 2.6 B.2.7 C. 2.8 D. 2.9 9. Multiply 53.61 by 1.02 A. 45.7811 B. 54.6822 C. 63.5933 D. 72.4344 10. Find the product of 2.215 and 0.001 . A. 0.2215 B. 0.02215 C. 0.002215 D. 0.0002215 11. What do you call a number that can be expressed in the form, where a and b are integers, and b is not equal to 0? A. Integers B. Irrational C. Natural D. Rational a а 7 b D. radicand D. 50 12. What do you call the positive nth root of a number? A. perfect square B. principal root C. radical 13. What is the principal root of V25 ? A. 2 B. 5 C. 25 14. What is the principal root of V100? A. 3.162277660... B. 5 C. 10 15. Which of the following describes the principal root of V50? A. Integers B. Irrational C. Natural D. 100 D. Rational​