Solve the investment problem.Mardi received an inheritance of $70,000. She invested part at 11% and deposited the remainder in tax-free bonds at 10%. Her total annual income from the investments was $7400. Find the amount invested at 11%.
A. $62,600
B. $20,000
C. $39,000
D. $40,000
Answer: D
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Solve the problem.Suppose that R ={(x, y): 0 ? x ? 7, 0 ? y ? 7},R1 = {(x, y): 0 ? x ? 7, 0 ? y ? 6}, andR2 = {(x, y): 0 ? x ? 7, 6 ? y ? 7}. Suppose, in addition, that
dA = 7, 
dA = 9, and 
dA = 2.Use the properties of integrals to evaluate 
dA.
A. 9 B. 18 C. 11 D. 7
Find the velocity vector in terms of ur and u?.r = 2 cos 2t and ? = 4t
A. v = (-8 sin 4t)ur + 4cos 4tu? B. v = (4 sin 2t)ur + 8cos 2tu? C. v = (-4 sin 2t)ur + 8cos 2tu? D. v = (-2 sin 2t)ur + 8cos 2tu?
For each given statement Sn, write the statements S1, S2, and S3 and verify that they are true.
= 
What will be an ideal response?
Simplify. Remember that we have assumed that radicands do not represent the square of a negative number.
A. (z - 6)2
B. 
- 6
C. z - 6
D. z - 