The length of a rectangle is 2 times its width. If the perimeter of the rectangle is 36 inches, find its length and width.
A. the length is 240 inches and the width is 12 inches
B. the length is 12 inches and the width is 6 inches
C. the length is 60 inches and the width is 12 inches
D. the length is 24 inches and the width is 12 inches
E. the length is 24 inches and the width is 6 inches
Answer: B
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Solve the problem.Suppose that R ={(x, y): 0 ? x ? 7, 0 ? y ? 7},R1 = {(x, y): 0 ? x ? 7, 0 ? y ? 6}, andR2 = {(x, y): 0 ? x ? 7, 6 ? y ? 7}. Suppose, in addition, that
dA = 7, 
dA = 9, and 
dA = 2.Use the properties of integrals to evaluate 
dA.
A. 9 B. 18 C. 11 D. 7
Add or subtract as indicated. Make sure that your answer is reasonable by estimating first.85.265 + 31.11 + 578.539 + 397.741
A. 571.9699 B. 734.6881 C. 1372.645 D. 1092.655
Find the vertices and the foci of the given ellipse.
+ 
= 1
A. V: (0, -20), (0, 20); F: (0, -12), (0, 12) B. V: (-20, 0), (20, 0); F: (0, -16), (0, 16) C. V: (-20, 0), (20, 0); F: (-12, 0), (12, 0) D. V: (0, -20), (0, 20); F: (-16, 0), (16, 0)
Write a formula for the general term (the nth term) of the geometric sequence.
, - 
, 
, - 
, . . .
A. an = 
- 
(n - 1)
B. an = 
n - 1
C. an = 
n - 1
D. an = 
n - 1 - 