The life expectancy of a fluorescent tube is normally distributed with a mean of 5,800 hours and a standard deviation of 800 hours. Find the probability that a tube lasts for more than 7,400 hours. Use the Empirical Rule.
a. 0.8410
b. 0.4770
c. 0.5230
d. 0.1590
d. 0.1590
Mathematics
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Find the indicated coordinates.(4, -2) is the vertex of the right angle of an isosceles right triangle. (2, -2) is a second vertex of the triangle. What are the coordinates of the third vertex?
A. (4, -4) B. (2, -4) or (2, 0) C. (4, -4) or (4, 0) D. (2, -4)
Mathematics
Integrate the function.
A. tan-1 
- tan-1 
B. sin-1 
- sin-1 
C. 
tan-1 
- 
tan-1 
D. 
tan-1 
Mathematics
Perform the indicated operations and simplify the expression.
?
?
A. 
B. 
C. 
D. 
E. 
Mathematics
The graph of a function is given. Determine whether the function is increasing, decreasing, or constant on the given interval.[-1, ?)
A. constant B. increasing C. decreasing
Mathematics