Special products can be illustrated by using areas of rectangles. Use the figure to justify the special product 
Give the monomial that represents the area of the black square.
A. b2
B. 2a
C. a2
D. ab
Answer: C
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Find the mean for the given sample data. Unless otherwise specified, round your answer to one more decimal place than that used for the observations.The grocery expenses for six families were src="https://sciemce.com/media/4/ppg__ttt0612190950__f1q197g6.jpg" alt="" style="vertical-align: -4.0px;" />. Compute the mean grocery bill. Round your answer to the nearest cent.
A. $107.47
B. $71.64
C. $73.97
D. $85.97
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Write the Hindu-Arabic numeral for the given Babylonian numeral.
A. 651 B. 4010 C. 351 D. 411
Write the number in standard form.7.21 × 10-4
A. -721,000 B. 0.0000721 C. 0.00721 D. 0.000721
Write the equation of a sine function that has the given characteristics.The graph of y = 
, shifted 8 units upward
A. y = 
B. y = 
+ 8
C. y = 
D. y = 
- 8