Use the summation properties and rules to evaluate the series. The following rules may be needed: 
.
A. -352
B. -384
C. -404
D. -396
Answer: B
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Solve the differential equation subject to the initial conditions.x 
+ 5y = x2; y = 12 when x = 2
A. y = 
+ 
B. y = 
- 
C. y = 
+ 7x5
D. y = 
+ 
Solve.The length L of wire (in feet) that would have resistance R (in ohms) is given by 
where d is the diameter of the wire in thousandths of an inch (or mils) and K is the specific resistance of the material.(a) Solve this formula for R. (b) Substitute 
for R in your answer to part (a) and then solve for d. (c) Use your answer to part (b) to find the diameter of copper wire (K = 10.4 ohms) 1480 ft long if the current I is 12.0 amperes and the voltage drop E is 10.0 volts. (Round to the nearest whole number.)
A. (a) R = 
,
(b) d = 
,
(c) 128 mils
B. (a) R = 
,
(b) d = 
,
(c) 136 mils
C. (a) R = 
,
(b) d = 
,
(c) 18,470 mils
D. (a) R = 
,
(b) d = 
,
(c) 18,630 mils
Solve.The area of a rectangular wall in a classroom is 220 square feet. Its length is 8 feet shorter than three times its width. Find the length and width of the wall of the classroom.
A. width = 10 ft; length = 18 ft B. width = 10 ft; length = 38 ft C. width = 10 ft; length = 34 ft D. width = 10 ft; length = 22 ft
Solve the inequality analytically. Support the answer graphically. Give exact values for endpoints.x2 + x - 4 ? 0
A. (
, 
)
B. (-?, 
] ? [
, ?)
C. (-?, ?)
D. ?