Use a tree diagram showing all possible results when four fair coins are tossed. Then list the ways of getting the indicated result.at least two tails
A. hhtt, htht, htth, thht, thth, tthh
B. hhtt, htht, htth, httt, thht, thth, thtt, tthh, ttht, ttth, tttt
C. httt, thtt, ttht, ttth, tttt
D. hhtt, htht, httt, thht, thth, tthh, ttht, ttth, tttt
Answer: B
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Solve the system.
a. a = 3, y = 7
b. 
c. x = 2, y = 3
d. x = 4, y = 3
e. no solution
The following chart shows some figures from an income statement. Prepare a vertical analysis by expressing each item as a percent of net sales. Round percents to the nearest tenth of a percent.
A. 40.7%, 8.2%, 5.0%, 4.7% B. 40.7%, 8.3%, 12.2%, 11.6% C. 40.7%, 8.2%, 60.6%, 4.7% D. 40.7%, 20.2%, 12.2%, 11.6%
Determine the standard equation of the ellipse described.Foci at (1, 4) and (7, 4); length of major axis is 10 units.
A. 
+ 
= 1
B. 
+ 
= 1
C. 
+ 
= 1
D. 
+ 
= 1
Solve.Bill took 0.312 minutes longer than Bob to run a marathon. Write this decimal as a fraction.
A. 
B. 
C. 
D. 