If one of the students is selected at random what is the probability he or she spent exactly 3 hours in the lab?
Use the following information to answer question, 24 students in an engineering class were asked to record the number of hours spent in a lab during a week. The results are listed below.
3, 10, 21, 14, 8, 5, 1, 4, 13, 7, 9, 6, 11, 10, 6, 7, 12, 16, 1 , 7, 14, 1, 11, 8
1/24
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Write an equivalent expression. Use an associative law.a + (b + 7)
A. (b + 7) + a B. a + (7 + b) C. (a + b) + 7 D. a(b + 7)
Solve the problem.A restaurant offers a choice of 5 salads, 7 main courses, and 2 desserts. How many possible 
meals are there?
A. 140 B. 70 C. 14 D. 35
Solve the system of equations using substitution.
A. x = -12, y = 5; x = -5, y = 12 B. x = 12, y = 5; x = 5, y = 12 C. x =-12, y = -5; x = -5, y = -12 D. x = 12, y = -5; x = 5, y = -12
Describe the strength and direction of the linear correlation.The ages and lengths of several animals of the same species are recorded in the following table:
A. Weak positive linear correlation B. Weak negative linear correlation C. Little or no linear correlation D. Strong negative linear correlation