Express the number in scientific notation.892,784,000,000
A. 8.92784 × 109
B. 8.92784 × 1011
C. 892.784 × 109
D. 8,927.84 × 108
Answer: B
Mathematics
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Write the expression as a sum, difference, or multiple of logarithms. Part of the logarithm may be determined exactly.log550
A. 1 + log52 B. 4 C. 2 + log52 D. log52 + log52
Mathematics
Find the center of mass of a thin plate of constant density covering the given region.The region bounded by the x-axis and the curve y = 7sin x, 0 ? x ? ?
A. 
= 
, 
= 
B. 
= 
, 
= 
C. 
= ?, 
= 
D. 
= 
, 
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Mathematics
Solve the following system by any appropriate method. If there is no real number solution, so state.y - 9x = 09x2 + y2 = 90
A. (1, 9) B. (-1, -9), (1, 9), (-1, 9), (1, -9) C. (-1, -9), (1, 9) D. (-1, -9)
Mathematics
Simplify the expression.
? 
A. 3
B. 
C. 5
D. 3
Mathematics