Perform the matrix operation.Given A =
and B = 
, find 3A + B.
A. 
B. 
C. 
D. 
Answer: D
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If one of the students is selected at random what is the probability he or she spent exactly 11 hours in the lab?
Use the following information to answer questions 2-10. 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
Solve the problem.A cup of coffee is heated to 194° and is then allowed to cool in a room whose air temperature is 
After 11 minutes, the temperature of the cup of coffee is 
Find the time needed for the coffee to cool to a temperature of 102°. Assume the cooling follows Newton's Law of Cooling: U = T + (Uo - T)ekt.(Round your answer to one decimal place.)
A. 29.7 minutes B. 26.4 minutes C. 41.1 minutes D. 15.1 minutes
Provide an appropriate response.Identify each of the variables in the Binomial Probability Formula.P(x) = 
? px ? qn-xAlso, explain what the fraction 
computes.
What will be an ideal response?
Find all cube roots of the complex number. Leave answers in trigonometric form.125
A. 5 cis 90°, 5 cis 210°, 5 cis 330° B. 5 cis 0°, 5 cis 60°, 5 cis 120° C. 5 cis 45°, 5 cis 165°, 5 cis 325° D. 5 cis 0°, 5 cis 120°, 5 cis 240°