Subtract.(-2r4 + 9r3 - 3r) - (8r4 - 9r3 + 6r2 - 2r)
A. 6r4 + 6r2 - r
B. -10r4 + 18r3 - 6r2 - r
C. -6r4 - 6r2 + r
D. 10r4 - 18r3 + 6r2 + r
Answer: B
Mathematics
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List all the elements of B that belong to the given set.B = {5, 
, -15, 0, 
, -
, 7.4, 8?, 0.848484...}Natural numbers
A. {5}
B. {-15, 0, 5}
C. 
D. {5, 0}
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Find the median.8.7, 6.7, 2.1, 6.1
A. 2.1 B. 6.1 C. 6.7 D. 6.4
Mathematics
Graph the function.f(x) = 2log2x
A. 
B. 
C. 
D. 
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A diagnostic test for a certain disease has a sensitivity of 0.76 and a specificity of 0.84. The probability that a patient has the disease is estimated as 0.15. The diagnostic test is given and returns negative. What is the posterior probability that the patient does not have the disease?
What will be an ideal response?
Mathematics