The nth term of a sequence is given. Calculate the fifth partial sum.an = 
A. 
B. - 
C. 
D. - 
Answer: D
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Round to the nearest thousandth.16.45768
A. 16.458 B. 16.4577 C. 16.4576 D. 16.46
Approximately 3.06 million people live in Costa Rica. 2.67 million are less than 50 years old, and 1.99 million are older than 14. How many people are in each of the categories 0-14 years, 15-49 years, and 50 years and older? ?
A. ?1.07 million in 0-14 years group,1.6 million in 15-49 year group,0.39 million in 50-and-older group. B. 1.9 million in 0-14 years group,1.07 million in 15-49 year group,0.59 million in 50-and-older group. C. 1.47 million in 0-14 years group,0.39 million in 15-49 year group,1.4 million in 50-and-older group. D. ?1.07 million in 0-14 years group,1.6 million in 15-49 year group,0.99 million in 50-and-older group. E. ?0.39 million in 0-14 years group,1.07 million in 15-49 year group,1.6 million in 50-and-older group.
Factor by grouping.15x2 - 12xy - 25xy + 20y2
A. (3x - 5)(5x - 4) B. (15x - 5y)(x - 4y) C. (3x + 5y)(5x - 4y) D. (3x - 5y)(5x - 4y)
Solve.A triangle is 6 cm wider than it is tall. The area is 140 cm2. Find the width (length of the base). 
A. 6 cm B. 20 cm C. 14 cm D. 21 cm