Write a word name for the number in the sentence.Scientists were predicting the demise of the space colony as the population approached 400,683,000.
A. four million, six hundred eighty-three thousand
B. four hundred million, six hundred eighty-three thousand
C. four hundred billion, six hundred eighty-three million
D. four hundred million, six hundred eighty-three
Answer: B
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Answer the question.Which of the following describes a study in which the researchers do not attempt to change the characteristics of those being studied?
A. Case-control study B. Single-blind experiment C. Observational study D. Double-blind experiment
Find the LCD of the given fractions by inspection.
and 
A. 14 B. 5 C. 45 D. 9
Find the function.Find the function that is finally graphed after the following transformations are applied to the graph of 
The graph is shifted down 6 units, reflected about the x-axis, and finally shifted left 9 units.
A. y = 
- 6
B. y = -
+ 6
C. y = -
+ 6
D. y = -
- 6
Graph the pair of parametric equations by hand, using values of t in [-2,2]. Make a table of t-, x-, and y-values, using t = -2, -1, 0, 1, and 2. Then plot the points and join them with a line or smooth curve for all values of t in [-2,2]. Do not use a calculator.x = -t2 - 1, y = t + 2
What will be an ideal response?