Complete the identity.
= ?
A. 0
B. -1
C. 2
D. 1
Answer: D
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Evaluate the expression.
?
?
A. 81 B. 12 C. 9 D. 8
Suppose 100 people counted the number of cars passing an intersection in one hour. Due to error, not all people get the same value. The mean is 75 and the standard deviation is 1. Use the sketch to find how many people report the following. 
Between 77 and 78 cars
A. 3 people B. 98 people C. 15 people D. 2 people
Simplify the expression. Assume that all variables are positive when they appear.5
+ 6
A. 11
B. -23
C. 13
D. 23
Find the circumference and the area of the circle. Use the rules for working with measurements.
A. The circumference is 25.1 in, the area is 201 in 2. B. The circumference is 50.3 in, the area is 25.1 in 2. C. The circumference is 25.1 in, the area is 50.3 in 2. D. The circumference is 50.3 in, the area is 101 in 2. E. The circumference is 12.6 in, the area is 101 in 2.