The following figure shows a graph that compares the present values of two ordinary annuities of $800 quarterly as functions of the number of quarters. One annuity is at an annual rate of 6% compounded quarterly, and the other is at 9% compounded quarterly. What present value is required to purchase an annuity of $800 a quarter for 25 years with an interest rate of 9% compounded quarterly? Check your answer against the graph. Round your answer to the nearest cent.
?
?
A. $31,713.39
B. $40,440.73
C. $27,577.08
D. $39,107.20
E. $52,000.00
Answer: A
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Find the flux of the curl of field F through the shell S.F = (8 - y)i + (6 + x)j + z4k; S is the upper hemisphere of x2 + y2 + z2 = 81
A. -4? B. 324? C. 2? D. 162?
Solve.The amount of simple interest earned on an investment over a fixed amount of time is jointly proportional to the principle invested and the interest rate. A principle investment of $2400.00 with an interest rate of 5% earned $360.00 in simple interest. Find the amount of simple interest earned if the principle is $4000.00 and the interest rate is 3%.
A. $216.00 B. $600.00 C. $360.00 D. $36,000.00
Solve the triangle. 
A. A = 51°, B = 87.2°, C = 41.8° B. A = 51°, B = 41.8°, C = 87.2° C. A = 41.8°, B = 87.2°, C = 51° D. A = 41.8°, B = 51°, C = 87.2°
Find: a. The center and radius of the circle. b. The x- and y-intercepts of the graph of the circle.x2 + y2 - 4y - 21 = 0
A. a. center = (0, -2); radius = 25
b. (
, 0), (0, 7), (0, -3)
B. a. center = (0, 2); radius = 5
b. (
, 0), (-
, 0), (0, 7), (0, -3)
C. a. center = (2, 0); radius = 25
b. (
, 0), (-
, 0), (0, 7), (0, -3)
D. a. center = (0, 2); radius = 5
b. (
, 0), (0, 7)