Write the word phrase as an algebraic expression. Use x to represent the unknown number.44 decreased by a number
A. 44 + x
B. x - 44
C. 
D. 44 - x
Answer: D
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Solve the problem.Find the centroid of the first-octant portion of a solid ball of radius 2 centered at the origin.
A. (
, 
, 
) = 
B. (
, 
, 
) = 
C. (
, 
, 
) = 
D. (
, 
, 
) = 
Steel has been playing a decreasing role in the manufacture of beverage cans in the United States. The use of bimetallic cans has been dwindling, whereas the use of all-aluminum cans has been growing steadily. The accompanying table gives the production (in billions) of all-aluminum cans over the period from 1975 through 1989:
Year19751977197919811983198519871989Cans, y16.72633.348.35765.874.283.3?
Find an equation of the least-squares line for these data. (Let 
represent the year 1975.) Please round the coefficients in your equation to three decimal places. Use the result to estimate the number of cans produced in 1996, assuming the trend continued. Round the answer to three decimal places.
?
A. 
billion cans
B. 
billion cans
C. 
billion cans
D. 
billion cans
Solve the problem.Anne writes one page in 
of an hour. How many pages can she write in 1
hours?
A. 2 page(s) B. 7 page(s) C. 5 page(s) D. 1 page(s)
Find the vertices and foci of the given ellipse.16x2 + 3y2 = 48
A. Vertices: (4, 0) and (-4, 0);
Foci: (
, 0) and (-
, 0)
B. Vertices: (0, 16) and (0, -16);
Foci: (0, 3) and (0, -3)
C. Vertices: (0, 4) and (0, -4);
Foci: (0, 
) and (0, -
)
D. Vertices: (0, 16) and (0, -16);
Foci: (0, 
) and (0, -
)