Write sigma notation. 
+ 
+ 
+ 
+ 
A. 
B. 
C. 
D. 
Answer: C
Mathematics
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Solve.A train traveled m mi at a speed of s mph. A bus following the same route traveled 7 mph slower. How much longer did the bus take than the train to make this trip? Write the answer as a single rational expression.
A. 
hr
B. 
hr
C. 
hr
D. 
hr
Mathematics
Graph the set of points whose polar coordinates satisfy the given equation or inequality.r = 3
A. 
B. 
C. 
D. 
Mathematics
Find the intercepts for the equation.0.2y - 0.4x = 0.8
A. (-2, 0); (0, 4) B. (2, 0); (0, -4) C. (4, 0); (0, -2) D. (-4, 0); (0, 2)
Mathematics
Change the logarithmic expression to an equivalent expression involving an exponent.ln 
= -4
A. e-4 = 
B. -4e = 
C. 
e = -4
D. 
-4 = e
Mathematics