Find the expected value and variance for the random variable whose probability density function is
? x ? 1.Enter just two reduced fractions (unlabeled) in the order E(X), Var(X) separated by a comma.
Fill in the blank(s) with the appropriate word(s).
19/24, 11/576
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Answer the question(s) based on the following situation: For a population of 2000 students taking the SAT math exam, the scores on the exam have an approximately normal distribution with mean ? = 590 and standard deviation ? = 70.Approximately how many students scored between 450 and 730?
A. 1900 B. 1994 C. 1950 D. 1360 E. none of these
Solve the problem.Which of the two rates would yield the larger amount in 1 year: 4.5% compounded semiannually or 4.4% compounded quarterly?
A. 4.5% compounded semiannually B. 4.4% compounded quarterly C. They will yield the same amount.
Write in terms of the cofunction of a complementary angle.cot 
A. cot 
B. tan 
C. tan 
D. cot 
Provide an appropriate response.An object is dropped from a height of 676 feet. The expression 676 - 16t2 gives the height of the falling object after t seconds. The time it takes for the object to reach the ground may be found by solving 
Solve for t.
A. 13 sec
B. 
sec
C. 
, or 6.5 sec
D. 4 sec