Use a calculator to find the following to four decimal places.
A. 11.6952
B. 272.9563
C. 27.2956
D. -2.3352
Answer: B
Mathematics
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Find the unit tangent vector of the given curve.r(t) = (4 - 2t)i + (2t - 9)j + (10 + t)k
A. T(t) = 
i - 
j - 
k
B. T(t) = - 
i + 
j + 
k
C. T(t) = 
i - 
j - 
k
D. T(t) = - 
i + 
j + 
k
Mathematics
Decide whether the statement is true or false.If a point lies on the y-axis, its x-coordinate is zero.
A. True B. False
Mathematics
Plot the complex number in the complex plane.z = 4i
A. 
B. 
C. 
D. 
Mathematics
One morning, John drove 5 hours before stopping to eat. After lunch, he increased his speed by 10 mph. If he completed a 490-mile trip in 9 hours of driving time, how fast did he drive in the morning? ? Please enter your answer as a number without the units.
Fill in the blank(s) with the appropriate word(s).
Mathematics