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41. Martin correctly answered 90% of the questions on a math test that contained exactly 40 questions. How many of the questions did he answer incorrectly?
42. In Mr. Montgomery’s class, there are 8 boys and 12 girls. If Mr. Montgomery selects 1 student from his class at random, what is the probability that the student will be a girl?
43. Jay went on a whale-watching trip in Massachusetts Bay and saw several whales. Which of the following units could be used to measure the length of a whale?
45. Mona counted a total of 56 ducks on the pond in Town Park. The ratio of female ducks to male ducks that Mona counted was 5:3. What was the total number of female ducks Mona counted on the pond?
