Find the sum of the angle measures of the specified polygon.A heptagon.
A. 1080°
B. 720°
C. 1260°
D. 900°
Answer: D
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Find the volume of the solid generated by revolving the region bounded by the given lines and curves about the 
. y = 
, y = 0, x = 0, x = 7
A. 7?
B. 
?
C. 
?
D. 
?
Write a formula for the nth term of the geometric sequence.
, - 
, 
, - 
, . . .
A. an = 
n - 1
B. an = 
n - 1
C. an = 
- 
(n - 1)
D. an = 
n - 1 - 
Determine whether the statement is true or false. {o} ? the set of vowels
A. True B. False
Solve the problem.The pH of a solution ranges from 0 to 14. An acid has a pH less than 7. Pure water is neutral and has a pH of 7. The pH of a solution is given by 
where H+ represents the concentration of the hydrogen ions in the solution in moles per liter. Find the pH if the hydrogen ion concentration is 
A. 1 B. -13 C. -1 D. 13