Solve.One end of a guy wire is attached to the top of a 27-foot pole and the other end is anchored into the ground 21 feet from the base of the pole. Find the length of the guy wire. Round to the nearest tenth of a foot.
21 feet
A. 34.9 ft
B. 48.7 ft
C. 34.2 ft
D. 48 ft
Answer: C
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Choose the best answer.The amount of water in a city's water tower is about
A. 3200 L B. 3200 mL C. 3200 cm3 D. 3200 kL
Solve.The amount of time it takes a swimmer to swim a race is inversely proportional to the average speed of the swimmer. A swimmer finishes a race in 50 seconds with an average speed of 3 feet per second. Find the average speed of the swimmer if it takes 25 seconds to finish the race.
A. 8 feet per second B. 5 feet per second C. 7 feet per second D. 6 feet per second
Solve the equation.-28 = 3y + y
A. -3 B. 7 C. -7 D. 3
Find the derivative of the function.y = (cos 2x + tan x5)4
A. 
= 4(- sin 2x + 5x4 sec x5 tan x5)3
B. 
= 4(cos 2x + tan x5)3(2 sin 2x + 5x4 cot2(x5))
C. 
= 4(cos 2x + tan x5)3(-2 sin 2x + 5x4 sec2(x5))
D. 
= 4(cos 2x + tan x5)3