Find the LCD for the list of rational expressions.
, 
A. 5a2 + 35
B. 5a2 + 7
C. 5a(a + 7)
D. 5a + 7
Answer: C
Mathematics
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Find the center of mass of the wire that lies along the curve r and has density ?.r(t) = 4ti + 8tj + 7t2k, 0 ? t ? 1; ?(x, y, z) = 
A. 
B. 
C. 
D. 
Mathematics
Use a finite approximation to estimate the area under the graph of the given function on the stated interval as instructed.f(x) = 1 - x2 between x = -1 and x = 1 using the "midpoint rule" with two rectangles of equal width.
A. 1.5 B. 0.75 C. 2 D. 0.5
Mathematics
Perform the indicated operation and write the answer in simplest form.
? 
A. 
B. 
C. 
D. 
Mathematics
Find IT if I2 = 40 mA and I3 = 40 mA.
a. 90 mA
b. 80 mA
c. 45 mA
d. 10 mA
e. Cannot be solved without knowing I1
Mathematics