Find an expression for the nth term of the arithmetic sequence.
, 
, 
, 
, 
, . . .
A. an = 
B. an = 
C. an = 
D. an = 
Answer: C
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Solve.The planets in a certain solar system have a path that is an ellipse, with Star A as one of the foci. Planet X has a perihelion of 588.6 million miles and an aphelion of 631.8 miles. Find an equation for Planet X's orbit. Express your answer with a and b in millions of miles, rounded to the nearest tenth of a million.
A. 
+ 
= 1
B. 
+ 
= 1
C. 
+ 
= 1
D. 
+ 
= 1
Solve the problem.From a distance of x feet to a 150-meter-high radio tower, the angle of elevation is ? degrees. Then 
Use a reciprocal identity to rewrite this formula.
A. 150 sec ?
B. 
C. 
D. 150 cot ?
Write the form of the partial fraction decomposition of the rational expression. Do not solve for the constants.
?
?
A. 
B. 
C. 
D. 
E. 
John and Rosamond want to retire in 8 years and can save $230 every three months. They plan to deposit the money at the end of each quarter into an account paying 7.42% compounded quarterly. How much will they have at the end of 8 years? ? Please round the answer to the nearest cent. ? $ __________
Fill in the blank(s) with the appropriate word(s).