Find the variance of the probability density function to the nearest hundredth.f(x) = 1 - ; [1, 4]

A. 0.57
B. 0.52
C. 0.61
D. 0.53


Answer: A

Mathematics

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Simplify the algebraic expression.4x + 8x

A. 12x B. -4x C. 12x2 D. 4x

Mathematics

Solve the equation.Find the value of x if y = -20, m = 2 and b = -2 in the formula y = mx + b.

A. x = -36 B. x = 9 C. x = -9 D. x = 36

Mathematics

Plot and interpret the appropriate scatter diagram.The table shows the study times and test scores for a number of students. Draw a scatter plot of score versus time treating time as the independent variable. Effect of Study on Test ScoreTime (min)

A.  Effect of Study on Test Score

Time (min)
More time spent studying may increase
test scores.
B.  Effect of Study on Test Score

Time (min)
More time spent studying may decrease
test scores.
C.  Effect of Study on Test Score

Time (min)
More time spent studying may increase
test scores.
D.  Effect of Study on Test Score

Time (min)
More time spent studying may decrease
test scores.

Mathematics

Find the percent using a proportion. Round your answer to the nearest tenth if necessary.What percent of 46 rabbits is 705 rabbits?

A. 1532.6% B. 153.3% C. 0.7% D. 0.1%

Mathematics