Estimate the sum or difference by first rounding as indicated.Estimate by first rounding to the nearest thousand.542733643856
A. 16,100
B. 15,000
C. 16,200
D. 16,000
Answer: B
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Write the following proportions.8 children is to 18 bicycles as 4 children is to 9 bicycles
A. 
= 
B. 
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C. 
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D. 
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Solve the problem.Using a phone card to make a long distance call costs a flat fee of $0.11 plus $0.16 per minute starting with the first minute. Use an equation to find the number of minutes a phone call lasts in which the total charge is $2.19.
A. 19 min. B. 13 min. C. 9 min. D. 23 min.
Solve the problem.A population of birds in a small county can be modeled by the polynomial 
where x = 1 corresponds to July 1, x = 2 to July 2, and so on. For what days does f estimate the population to be 8550?
A. July 11th B. July 12th C. July 13th D. July 14th
Graph the system of inequalities. Shade the region that represents the points of intersection.
A. 
B. 
C. 
D. 