Integrate the function f over the given region.f(x, y) = 
+ 
over the trapezoidal region bounded by the x-axis, y-axis, line 
and line 
A. 60
B. 30
C. 25
D. 40
Answer: B
Mathematics
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Solve the problem.Roberto invested some money at 8%, and then invested $3000 more than twice this amount at 11%. His total annual income from the interest was $3930. How much was invested at 11%?
A. $27,000 B. $9000 C. $24,000 D. $2700
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Fill in the missing value.96.2 hg = kg
A. 9620 B. 96.2 C. 9.62 D. 0.962
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Find the exact value of the expression.cos (-390°)
A. - 
B. 
C. - 
D. 
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Write an equation for the piecewise function.
A. f(x) = 
B. f(x) = 
C. f(x) = 
D. f(x) = (x - 3)2 - 5
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