Graph the pair of parametric equations with the aid of a graphing calculator.x = 7t - 7 sin t, y = 7 - 7 cos t, -2? ? t ? 2? 
A. 
B. 
C. 
D. 
Answer: C
Mathematics
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Use a formula to solve the problem.The area of a trapezoid is 76 square feet. If the bases are 5 and 14 feet, find the altitude of the trapezoid.
A. 16 ft B. 4 ft C. 1.5 ft D. 8 ft
Mathematics
Find the first partial derivatives of the function.
?
?
A. 
B. 
C. 
D. 
E. 
Mathematics
Use the formula for the sum of the first n terms of a geometric sequence.Find 
.
A. -5462 B. 2730 C. -10,922 D. -2730
Mathematics
Solve the problem.An investment is worth $3654 in 1993. By 1997 it has grown to $5394. Let y be the value of the investment in the year x, where x = 0 represents 1993. Write a linear equation that models the value of the investment (y) in the year x.
A. y = 
x + 3654
B. y = -435x + 7134
C. y = 435x + 3654
D. y = -435x + 3654
Mathematics