Find the indicated sum.Find the sum of the first 30 terms of the arithmetic sequence: -9, -19, -29, -39, . . .
A. -4613
B. -309
C. -4620
D. -4770
Answer: C
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Find the standard deviation of the data.The manager of an electrical supply store measured the diameters of the rolls of wire in the inventory. The diameters of the rolls (in m) are listed below. Find the standard deviation. Round to four decimal places.0.309 0.35 0.488 0.331 0.262 0.115 0.288
A. 0.6561 m B. 0.1114 m C. 0.3310 m D. 0.7305 m
Find the phase shift of the function.y = 5 cos (6x + ?)
A. 5? units to the right
B. 6? units to the right
C. 
units to the left
D. 
units to the left
Find the unknown number in the proportion. Round answer to the nearest hundredth when necessary.
= 
A. x = 19.5 B. x = 29.25 C. x = 30.5 D. x = 8.75
Set up the iterated integral for evaluating 
Dover the given region D.D is the solid right cylinder whose base is the region between the circles 
and 
and whose top lies in the plane 
.
A. 
B. 
C. 
D. 