Find any numbers for which the rational expression is undefined.
A. x = 0
B. x = 9
C. x = -10, x = 0, x = 10
D. x = -9
Answer: B
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The number S of species of birds on an island is given approximately by
,
where A is the area, in square kilometers, of the island that is usable for birds.A: If a conservation program is able to increase the usable area by 25%, how is the number of species affected? Express your answer in terms of a percent.B: If a natural disaster reduces the usable area of the island by 23%, how is the number of species affected? Express your answer in terms of a percent.C: If the number of bird species is 54, and the usable area is 218 square kilometers, find the value of c.
?
Round your answers to two decimal places if necessary.
?
What will be an ideal response?
Find all real numbers in [0, 2?] that satisfy the equation.
cos (2x) = 1
A. 0, 
, ?, 
B. 
, 
, 
, 
C. 
, 
, 
, 
D. no solution
Solve the equation and check your solution.
= 
+ 
A. 3
B. 
C. - 
D. -3
Provide an appropriate response.The table shows the number of pupils per teacher in selected counties in a certain state. 
For which counties are the values not less than 16.7?
A. Cumberland, Kendall B. Addison, Cumberland, Kendall C. Branson, Dixson, Hendricks, Putnum D. Addison, Branson, Dixson, Hendricks, Putnum