Solve the proportion for the item represented by a letter.
?
?
A. 
B. 
C. 
D. 
E. 
Answer: C
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Solve the problem. Round your answer to 2 decimal places when necessary.The population of a certain country is about 105 million. The overall birth rate is 19.9 births per 1000. Approximately how many births were there in the country?
A. 20,900 births B. 20.9 million births C. 2.09 million births D. 209,000 births
Graph the function f(x) over the given interval. Partition the interval into 4 subintervals of equal length. Then add to your sketch the rectangles associated with the Riemann sum 
, using the indicated point in the kth subinterval for ck.f(x) = 2x + 1, [0, 2], left-hand endpoint
A. 
B. 
C. 
D. 
Find the exact value of the expression.cos 
cos 
- sin 
sin 
A. 0
B. 1
C. -1
D. 
Solve the inequality. Write the solution set in interval notation and graph it.-4(3y - 2) < -16y - 8
A. (-?, -4)
B. (-4, ?)
C. (-?, -4]
D. [-4, ?)