Solve the problem.A tower is supported by a guy wire 
long. The wire makes an angle of 
with respect to the ground, and the distance from the point where the wire is attached to the ground and the tower is 
Approximate the height of the tower to the nearest tenth of a foot.
A. 614.1 ft
B. 435.2 ft
C. 574.6 ft
D. 486.1 ft
Answer: B
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Suppose you have the following project digraph. (The numbers in parentheses represent hours.)
The length of the critical path for the entire project is
A. 37 hours. B. 18 hours. C. 15 hours. D. 30 hours. E. none of these
Multiply the conjugates.(7 - 5i)(7 + 5i)
A. 49 + 25i B. 24 C. 49 - 25i D. 74
Find the probability.The table lists the eight possible blood types. Also given is the percent of the U.S. population having that type.
Let E be the event that a randomly selected person in the U. S. has type B blood. Let F be the event that a randomly selected person in the U. S. has RH-positive blood.Find P(F|E).
A. 0.818 B. 0.340 C. 0.720 D. 0.107
Translate the phrase; then simplify.Find the sum of -61 and -79.
A. 140 B. -18 C. 18 D. -140