Find k such that the function is a probability density function over the given interval. Then write the probability density function.f(x) = 
; [1, 13]
A. ln 13; f(x) = x ln 13
B. 
; f(x) = 
C. 1 - ln 13; f(x) = 
D. 
; f(x) = 
Answer: D
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Add the given vectors by using the trigonometric functions and the Pythagorean theorem.A = 28, ? = 211 °B = 11, ? = 201 °
A. R = 7, ? = 208° B. R = 39, ? = 242° C. R = 39, ? = 28° D. R = 39, ? = 208°
Solve.The area of a rectangle must be at least 119 square feet. If the length is 7 feet, find the minimum for the rectangle's width.
A. 52
ft
B. 17 ft
C. 18 ft
D. 
ft
Solve the problem.A commuter drives 12 miles north from home and then 16 miles west to get to work. What would be the length of the trip if it were possible to drive along a straight line from home to work?
A. 11 mi B. 14 mi C. 19 mi D. 20 mi
Perform the indicated operation.Given f(x) = 
and g(x) = 
. find f(x) ÷ g(x).
A. 
B. 
C. 
D. 