Evaluate the integral by using multiple substitutions.
dr
A. 
sin 
+ C
B. 
sin 
+ C
C. -sin 
+ C
D. 
+ C
Answer: A
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Graph the pair of parametric equations with the aid of a graphing calculator.x = 6 sin t - sin 6t, y = 6 cos t - cos 6t, 0 ? t ? 2?
A. 
B. 
C. 
D. 
Solve.It is estimated that y, the number of items of a particular commodity (in millions) sold in the United States in year x, where x represents the number of years since 1990, is given by the formula 
That is, 
represents 1990, 
represents 1991, and so on. According to the formula, how many items sold in 1995?
A. 10.87 millions B. 3.07 millions C. 9.57 millions D. 21.85 millions
Write the expression with only positive exponents and evaluate if possible. Assume all variables represent nonzero real numbers.-(-6)0
A. 6 B. 1 C. -1 D. 0
Provide an appropriate response.Using a combination of words and graphs, explain the meaning of the equation 
What will be an ideal response?