Find the curvature of the space curve.r(t) = -7i + (t + 4)j +(ln(cos t) + 9)k
A. ? = sec t
B. ? = csc t
C. ? = sin t
D. ? = cos t
Answer: D
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Use a power regression model for the following data to answer the following question. If x is multiplied by 4, what is the effect on y? x 1 3 4 7 8 y 13.01 2.72 2.43 1.49 1.17?
A. y is multiplied by 2.47. B. y is multiplied by 2.71. C. y is multiplied by 2.37. D. y is unchanged.
Decide whether the statement is true or false.If a circle is split in half so as to make a semicircle, the diameter now becomes the radius and the radius is reduced to one-third its original size.
A. True B. False
Express the number in scientific notation.0.000315
A. 3.15 × 10-3 B. 3.15 × 104 C. 3.15 × 10-4 D. 3.15 × 10-5
Simplify the radical expression. Assume that all variables represent positive real numbers.
? 
A. x
B. x
C. 
D. 