Use the properties of logarithms to simplify the expression.
?
?
A. 17
B. 0
C. 
D. -17
E. 
Answer: A
Mathematics
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Find the mass of the wire that lies along the curve r and has density ?.r(t) = (2 cos t)i + (2 sin t)j + 2tk, 0 ? t ? 2?; ? = 5
A. 20?
units
B. 40?
units
C. 4?
units
D. 10? units
Mathematics
Find the point(s) at which the given function equals its average value on the given interval.f(x) = 1 - x2; [-6, 3]
A. 
B. ±
C. ±3
D. ±2
Mathematics
Solve the problem.A weather forecaster predicts that the temperature will drop 5 degrees each hour for the next 7 hours. If the temperature is 18 degrees before the temperature starts falling, what is the temperature after the drop?
A. 6° B. 35° C. -17° D. -35°
Mathematics
Compute the dot product u ? v.u = 
, v = 
A. 225 B. 30 C. -195 D. 255
Mathematics