Decide whether or not the function is a probability density function on the indicated interval.f(x) = 
x2; [1, 4]
A. No
B. Yes
Answer: B
Mathematics
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Use the order of operations to simplify the expression.
÷ 
A. 
B. 
C. 
D. 
Mathematics
Find all real numbers that satisfy the equation. Round approximate answers to 2 decimal places.3 = 5 cos(x) + 2
A. 0.98 + 2k? or 5.30 + 2k? where k is any integer B. 1.37 + k? or 4.91 + k? where k is any integer C. 1.37 + 2k? or 7.65 + 2k? where k is any integer D. 1.37 + 2k? or 4.91 + 2k? where k is any integer
Mathematics
Solve the problem.Roberto invested some money at 7%, and then invested $2000 more than twice this amount at 12%. His total annual income from the two investments was $3960. How much was invested at 12%?
A. $26,000 B. $24,000 C. $2600 D. $6000
Mathematics
Match the equation to the correct graph.y = 
(x - 2)2 + 1
A. 
B. 
C. 
D. 
Mathematics