Solve the problem.According to one theory of learning, the number of items, w(t), that a person can learn after t hours of instruction is given by: w(t) = 15
,0 ? t ? 64Find the rate of learning at the end of eight hours of instruction.
A. 45 items per hour
B. 20 items per hour
C. 60 items per hour
D. 5 items per hour
Answer: D
Mathematics
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Use the Gauss-Jordan method to find A-1, if it exists.A = 
A. 
B. 
C. 
D. Does not exist
Mathematics
Make a numerical representation (table) of f for x = -2, -1, . . . , 2 then graph the function. Round table values to the nearest hundredth when necessary.f(x) = 
x - 
A. 
B. 
C. 
D. 
Mathematics
Solve the problem.A salesman packed 3 shirts and 6 ties. With one shirt, he could wear all 6 ties. With another shirt, he could wear 5 ties. With the third shirt, he could wear only 3 ties. How many different combinations did he have?
A. 14 B. 13 C. 90 D. 33
Mathematics
Solve the problem.The equation of a line is y = 
x. What is the slope of a line perpendicular to it?
A. - 
B. - 2
C. 
D. 0
Mathematics