Solve the problem.The diameter of a tree was 9 in. During the following year, the circumference increased 
About how much did the tree's diameter increase? (Leave your answer in terms of ?.)
A. 
in.
B. 
in.
C. 
in.
D. 
in.
Answer: A
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Solve the problem.If an object is dropped from a tower of unknown height, the velocity of the object after t seconds can be obtained by multiplying t by 32 and adding 10 to the result. Therefore, you can express V as a linear function of t. Find the domain of this function.
A. [1, 4] B. [0, ?) C. (-?, ?) D. (-1, ?)
Find an equation of a square root curve of the form 
that approximately contains the given points. Round the values of a and b to the second decimal place if necessary.(1, 16) and (23, 3)
A. y = 3.42
+ 19.42
B. y = -5.01
+ 21.01
C. y = -3.42
+ 19.42
D. y = -3.42
+ 12.58
Solve the problem.Robert has built a mechanical model solar system with three balls representing planets at the ends of rods attached to the center representing the sun. The planets are aligned when he turns on the motor. The innermost planet makes a revolution in 18 seconds, the middle planet makes a revolution in 30 seconds, and the outermost planet makes a revolution in 42 seconds. After how many seconds will the planets be aligned again?
A. 315 sec B. 945 sec C. 630 sec D. 1,260 sec
Write out the first five terms of the sequence.an = 
A. - 
, 1 , 
, 1 , 
B. - 
, - 
, 
, 
, 
C. 1, 1, 1, 1, 1
D. 1, - 
, 1, 
, 1