Calculate the arc length of the indicated portion of the curve r(t).r(t) = (5t sin t + 5 cos t)i  + (5 t cos t - 5 sin t)j ; -3 ? t ? 7

A. 290
B. 200
C. 145
D. 100

Answer: D

Mathematics

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A. y =  x4 +  
B. y = 7x4 +  
C. y =  x3 +  
D. y =  x9/2 + c

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Rationalize the numerator. Assume that all radicands represent positive real numbers.

A.
B.
C. - 
D.

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Solve the formula for the specified variable.A = h(b1 + b2) for b1

A. b1 =  
B. b1 = 
C. b1 =  
D. b1 =  

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Determine the value of x so that the points (-2,4), (1,1), and (x,6) are collinear.

What will be an ideal response?

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