Solve the problem.Shari enjoyed services at a spa. The total cost of these services was $310. If she decides to leave a 9% tip, how much should the tip be? Round your answer to the nearest cent.
A. $24.80
B. $27.90
C. $279.00
D. $31.00
Answer: B
Mathematics
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Evaluate the definite integral. Express the answer in terms of natural logarithms.
A. ln(
+ 3)
B. ln(
+ 2)
C. ln
D. ln(
+ 
)
Mathematics
Determine whether the line through each pair of points is perpendicular. Answer perpendicular or not perpendicular. ? A(3, 9), B(11, 5) and C(-3, -9), D(2, 1)
What will be an ideal response?
Mathematics
Solve the problem.Find the value of k so that the graph of 9y + kx = 4 and the line containing the points 
and 
are perpendicular.
A. k = 15.75 B. k = -20.25 C. k = 20.25 D. k = -15.75
Mathematics
Find an equation for the line with the given properties.Perpendicular to the line x = 3; containing the point (2, 1)
A. x = 2 B. x = 1 C. y = 2 D. y = 1
Mathematics