Solve the problem.A tank contains 1
gallons of water. Its capacity is 
How much more water is needed to fill it?
A. 7
gal
B. 
gal
C. 1 gal
D. 3
gal
Answer: D
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Find the first term and the common difference.524, 513, 502, 491, . . .
A. a1 = 524, d = -524 B. a1 = 524, d = 524 C. a1 = 524, d = -11 D. a1 = 524, d = 11
Find the volume of the solid generated by revolving the region about the y-axis.The region in the first quadrant bounded on the left by the circle x2 + y2 = 16, on the right by the line 
, and above by the line y = 4
A. 64?
B. 
?
C. 
?
D. 16?
Factor. Check by multiplying.ar - as + at
A. ar(1 - s + t) B. r(a - s + t) C. a(r + s + t) D. a(r - s + t)
Find the simple interest for the period indicated. Then use table values to find the compound interest. Finally, find the difference between compound interest and simple interest. Round to the nearest cent. (Interest is compounded annually.)
Principal: $1462 Rate: 6% Years: 13
A. $427.19 B. $837.62 C. $515.98 D. $1977.98