Find an equation for the line tangent to the curve at the point defined by the given value of t.x = csc t, y = 9 cot t, t = 
A. y = -18x + 9
B. y = 3
x - 18
C. y = 18x + 3
D. y = 18x - 9
Answer: D
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The circulation M, in thousands, of a certain magazine t years after 2010 is given by
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.
This formula is valid over the period from 2010 to 2015 only.A: Make a graph of M versus t.B: There are two values of t that have a circulation of 9 thousand. Find both of them.C: Explain in practical terms what is happening to magazine sales over the period from 2010 to 2015.
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Round your answer to two decimal places if necessary.
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What will be an ideal response?
Complete the construction.Given 
, construct the perpendicular bisector of 
without putting any marks below 
.
What will be an ideal response?
Identify the digit with the given place value.0.456394tenths
A. 5 B. 0.4 C. 0 D. 4
Solve the problem.The number of periods needed to double an investment when a lump sum is invested at 2%, compounded semiannually, is given by n = log1.01 2. Use the change of base formula to find n, rounded to the nearest tenth.
A. 69.7 periods B. 72.7 periods C. 65.7 periods D. 74.7 periods