Find the domain of the composite function (g ? f)(x). Write the domain in interval notation.f(x) = 4x2 + 4x + 5, g(x) = 4x - 7
A. (-?, 0) ? (4, ?)
B. (-?, ?)
C. (-?, 0]
D. [0, ?)
Answer: B
Mathematics
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Solve the problem.Find the hydrogen ion concentration of a solution whose pH is 7.5. Use the formula 
A. -8.75 x 10-1 B. 8.75 x 10-1 C. 3.16 x 107 D. 3.16 x 10-8
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Graph the integrand and use areas to evaluate the integral.
A. 
B. 81
C. 243
D. 162
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Solve the problem. Express your answer as an integer or simplified fraction.-2(2x + 5) - 4 = -2(x + 2) + 4x
A. 
B. 
C. 
D. 
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Right triangle ABC has 
, 
, and 
style="vertical-align: middle;" data-wiris-created="true" varid="variable_id_field" variablename="impvar_14455ebf5b3b4469b28aa8009" />. Use this information to find cos A.
?
A. 
B. ?
C. ?
D. ?
E. ?
Mathematics