Solve.Find the total cost of tiling a triangular area having a base length of 3 meters and a height of 9 meters if it costs $4.21 to tile one square meter. Round to the nearest cent.
A. $56.84
B. $113.67
C. $27.00
D. $50.52
Answer: A
Mathematics
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Simplify.
A. x B. -1 C. -x D. 1
Mathematics
Solve the problem.After a new firm starts in business, it finds that its rate of profits (in hundreds of dollars per year) after t years of operation is given by 
Find the profit in year 2 of the operation.
A. $2800 B. $1600 C. $3200 D. $3000
Mathematics
Write the number in standard notation.A light-year is a measure of length defined as the distance that light travels in one year, which is about 
kilometers. Write this number in standard notation.
A. 9.500000000000 B. 9,500,000,000 C. 0.0000000000095 D. 9,500,000,000,000
Mathematics
Find the polar form of the complex number.7i
A. 7(cos 
+ i sin 
)
B. 7(cos 0 + i sin 0)
C. 7(cos 
+ i sin 
)
D. 7(cos ? + i sin ?)
Mathematics