Find the standard deviation of the probability density function to the nearest hundredth.f(x) = 4x-5; [1, ?]
A. 0.47
B. 0.57
C. 0.50
D. 0.44
Answer: A
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Provide an appropriate response.Find the area of the triangle as shown. Round the answer to four significant digits. 
A. 145.3 m2 B. 320.0 m2 C. 36.32 m2 D. 137.2 m2
Find the value of the unique real number ? between 0 and 2? that satisfies the given conditions.cos ? = - 
and tan ? < 0
A. 
B. 
C. 
D. 
Subtract.
?
?
A. 875 B. 975 C. 946 D. 976 E. 1,075
Tell what was done to the first equation to get the second equation. x–5 = -2; x=3
A) 5 was subtracted from both sides of the first equation. B) 5 was added to both sides of the first equation. C) Both sides of the first equation were multiplied by 5. D) Both sides of the first equation were divided by 5. E) -5 was added to both sides of the first equation.