Solve.To the nearest dollar, the average tuition at a public four-year college was 
in 1997 and 
in 1999. Use the ordered pairs (1997, 
) and (1999, $3250) to find and interpret the slope of the line representing the change in tuition (to the nearest dollar per year).
A. tuition increased $118 per year
B. tuition decreased $101 per year
C. tuition increased $112 per year
D. tuition increased $101 per year
Answer: D
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Solve the problem.A continuous random variable X has PDF f(x) = 
x(9 - x), 
Find E(X2).
A. 
B. 
C. 
D. 
Solve the problem.Find the sum of all the integers from -32 to 50.
A. 779 B. 747 C. 729 D. 697
Express the number in words.64,000,972
A. six million, four hundred thousand, nine hundred seventy-two B. sixty-four thousand, nine hundred seventy-two C. sixty-four million, nine thousand, seventy-two D. sixty-four million, nine hundred seventy-two
Provide the proper response.To rationalize the denominator of an expression such as 
, we multiply both the numerator and the denominator by 
. By what number are we actually multiplying the given expression, and what property of real numbers justifies the fact that our result is equal to the given expression?
What will be an ideal response?