Find the acceleration vector in terms of ur and u?.r = 2 cos 2t and ? = 4t
A. a = (-40 sin 2t)ur - 32 cos 2tu?
B. a = (-40 cos 2t)ur + 32 sin 2tu?
C. a = (-40 cos 2t)ur - 32 sin 2tu?
D. a = (-40 cos 4t)ur - 32 sin 4tu?
Answer: C
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Express the integrand as a sum of partial fractions and evaluate the integral.
A. 1.64 B. -1.64 C. 3.27 D. 1.81
Determine the area of the surface generated when the curve is revolved about the indicated axis.x = 3
, for 0 ? y ? 
; about the y-axis
A. 5?
B. 
?
C. 
?
D. 
?
Write the number as a decimal.5.378 × 105
A. 53,780 B. 268.9 C. 537,800 D. 5,378,000
Provide an appropriate response.Determine whether a linear or quadratic function would be a more appropriate model for the graphed data. If linear, tell whether the slope should be positive or negative. If quadratic, decide whether the coefficient of x2 should be positive or negative. CRIME STATISTICS 
Years since 2000
A. Linear; negative B. Quadratic; positive C. Quadratic; negative D. Linear; positive