18. A newborn baby weighs 7 lb 8 oz (seven pounds and eight ounces). If 1 lb = 0.454 kg, what is done to convert the baby’s weight to kilograms?

A. Multiply 7.8 by 0.454

B. Divide 7.8 by 0.454

C. Divide 7.5 by 0.454

D. Multiply 7.5 by 0.454

19. By Internet search, you discover that 1 in. (1″) is the same as 2.54 cm. How would you convert a man’s waist girth (circumference) from 40″ to centimetres?

A. Multiply 40 by 2.54

B. Divide 40 by 2.54

C. Divide 2.54 by 40

D. Multiply 40.1 by 2.54