Identify the type of sampling described by the proposal.A writer for an art magazine randomly selects and interviews fifty male and fifty female artists.
A. simple random sample
B. systematic sample
C. stratified sample
D. convenience sample
E. cluster sample
Answer: C
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Solve the application and answer with a complete sentence.A ball is dropped from a height of 1752 feet. The ball's height above the ground after x seconds is given by 
How high above the ground was the ball 9 seconds after falling?
A. The ball was 1608 feet above the ground. B. The ball was 456 feet above the ground. C. The ball was 1464 feet above the ground. D. The ball was 1671 feet above the ground.
Solve the rational inequality. Express the solution in interval notation.
< 0
A. (6, ?) B. (-4, 6) C. (-?, -4) D. (-?, -4) ? (6, ?)
Factor.3x2y7 + 9x2y6
A. 3x6y2(y + 3) B. x2y6(3y + 3) C. y + 3 D. 3x2y6(y + 3)
The letters x and y represent rectangular coordinates. Write the equation using polar coordinates (r, ?).y = x
A. sin ? = - cos ? B. r = cos ? C. r = sin ? D. sin ? = cos ?