Calculate the arc length of the indicated portion of the curve r(t).r(t) = (9cos3 4t)j + (9sin3 4t)k; 
? ? t ? 
?
A. 0
B. 
C. 27
D. 
Answer: D
Mathematics
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Evaluate the integral.
dz
A. - 
csc 
+ C
B. csc 
+ C
C. -csc 
+ C
D. -cot 
+ C
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Simplify the expression.8 - (7 - 4)3
A. -19 B. 35 C. 17 D. -1
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Write 28,000,000 in scientific notation.
A. 2.8 × 107 B. 28 × 106 C. 2.8 × 10-7 D. 2.8000000 × 107
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Find the linear function that is the best fit for the given data. Round decimal values to the nearest hundredth, if necessary.
A. y = 0.75x + 5.07 B. y = 0.95x + 3.07 C. y = 0.75x + 4.07 D. y = 0.85x + 3.07
Mathematics