Find the expected value of a random variable X having the following probability distribution:
x2468
?
?Round your answer to tenth if necessary.
A. 
B. 
C. 
D. 
E. 
Answer: C
Mathematics
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Find the reciprocal, if it exists.-6.7
A. - 
B. 1
C. - 
D. 6.7
Mathematics
A formula is given, along with values for all but one of the variables in the formula. Find the value of the variable that is not given. Round to the nearest hundredth when necessary.C = 2?r; C = 31.40, ? = 3.14
A. r = 10 B. r = 5 C. r = 197.19 D. r = 34.54
Mathematics
Write the statement as an inequality.x is less than 6
A. x > 6 B. x < 6 C. x ? 6 D. x ? 6
Mathematics
The half-life of phosphorus-32 is 14.3 days. What is the decay rate? As a percent, round to two decimal places.
What will be an ideal response?
Mathematics