Solve the problem.A $86,000 trust is to be invested in bonds paying 9%, CDs paying 6%, and mortgages paying 10%. The bond and CD investment together must equal the mortgage investment. To earn a $7180 annual income from the investments, how much should the bank invest in bonds?
A. $33,000
B. $10,000
C. $43,000
D. $8,000
Answer: B
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Use the Trapezoidal Rule with n = 4 steps to estimate the integral.
A. -1 - 
B. - 
C. - 
D. - 
Find the sum of the infinite geometric series, if possible. If it is not possible, explain why. If necessary, round to three decimal places.21 + 7 + 
+ . . .
A. 5.25
B. 15.75
C. The sum does not exist because 
? 1.
D. 31.5
Use a graphing calculator to graph the function using the given viewing window. Use the graph to decide if the function is one-to-one. If the function is one-to-one, give the equation of the inverse function.f(x) = 
; [-8, 8] by [-8, 8]
A. not one-to-one
B. one-to-one; f-1(x) = 
C. one-to-one; f-1(x) = 
D. one-to-one; f-1(x) = 
Factor completely. If the polynomial cannot be factored, say it is prime.7y6 - 39y3 + 20
A. (7y3 - 4)(y3 - 5) B. (7y3 - 5y2 + y - 4)(y3 - 4y2 + y - 5) C. y2(7y2 - 4)(y2 - 5) D. y4(7y - 4)(y - 5)