Evaluate the expression.(77)
A. 1
B. 2
C. 0
D. 5,040
Answer: A
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If k is negative, then the power function 
is a decreasing function for positive values of ?x.
Answer the following statement true (T) or false (F)
Find the total area of the region between the curve and the x-axis.y = -x2 + 9; 0 ? x ? 5
A. 
B. 
C. 
D. 
The pH of a solution is given by the formula 
, where 
is the concentration of hydrogen ions in moles per liter in the solution. Use this formula to solve the problem.The pH value of a substance is 5.42. Find the hydrogen-ion concentration for this substance.
A. 263,026.8 B. 0.0000038 C. 1.7 D. 0.2
Use the graph to determine the x- and y-intercepts.
A. x-intercept: -2; y-intercepts: 2, 1, 5 B. x-intercept: -2; y-intercepts: -2, 1, -5 C. x-intercepts: 2, 1, 5; y-intercept: -2 D. x-intercepts: -2, 1, -5; y-intercept: -2