Evaluate 
at the indicated value of x. Round your result to three decimal places.
?
?
A. 1.85
B. 0.541
C. 0.014
D. -0.541
E. -1.85
Answer: A
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Identify the type of surface represented by the given equation.
+ 
- 
= 1
A. Hyperboloid of two sheets B. Hyperboloid of one sheet C. Elliptical cone D. Ellipsoid
Find a rectangular equation for the plane curve defined by the parametric equations.x = 8 sin t, y = 8 cos t; 0 ? t ? 2?
A. y2 - x2 = 64; for x in -? < x < ?
B. y = x2 - 9; for x in -2 ? x ? 2
C. y = 
= 64; for x in -? < x < ?
D. x2 + y2 = 64; for x in -8 ? x ? 8
Express the distance between the given numbers using absolute value. Then find the distance by evaluating the absolute value expression.31 and -30
A. |-31 + (-30)| = -1 B. |(-30) - 31| = -61 C. |31 - (-30)| = 61 D. |31 + (-30)| = 1
Solve the problem.Suppose that the dollar cost of producing x radios is 
Find the marginal cost when 30 radios are produced.
A. $42 B. $1320 C. $18 D. -$1320