Numerade

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Using the properties of expected value, prove the shortcut rule for the population covariance: Cov(X,Y)=E(XY)-E(X)E(Y)

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What is the answer to the problem i created?

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If $k \ge 1$, the graphs of $y = \sin x$ and $y = ke^{-x}$ intersect for $x \ge 0$. Find the smallest value of $k$ for which the graphs are tangent. $k = \text{_____}$ What are the coordinates of the point of tangency? $x = \text{_____}, y = \text{_____}$

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A $ 100-\mathrm{kg} $ box is sitting on a horizontal surface. The coefficient of static friction between the box and the ground is 0.60 , and the coefficient of dynamic friction is 0.30 . What normal force must be exerted on the box? Firiction $ =\mu\left(F_{\text {normal }}\right) $ A. 880 N B. 745 N c. 261 N D 484 N

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The senior fitness program Silver Sneakers is a free program to Medicare and Medicaid supplement participants that encourages older adults to participate in organized exercise programs. A) True B False Clear selection

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The onset of schizophrenia is typically associated with early O infancy. O adulthood. O childhood. O adolescence.

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When the price of good 1 changes ceteris paribus, a consumer will be motivated to consume a different market basket than they were consuming. Economists say that that this price change has two "effects." One is known as the preference effect; this happens because preferences change as prices change the supply effect; because the change in price would be due to a change in supply the substitution effect; because now the consumer wouldn't have to reduce their consumption of other goods as much in order to consume more good 1 when the price of good 1 goes down the demand effect; because a person naturally wants to buy more of a good when it's cheaper

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Find each length below. (a) In the figure below, two chords intersect inside the circle at point E. Suppose that $EJ = 14$, $EM = 7$, and $EN = 35$. Find $JK$. $JK =$ (b) In the figure below, a tangent and a secant are drawn to a circle from exterior point $U$. Suppose that $UD = 22.5$ and $UG = 15$. Find $UC$. $UC = $

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You are going to deposit $22,500 today. You will earn an annual rate of 4.7 percent for 12 years, and then earn an annual rate of 4.1 percent for 15 years. How much will you have in your account in 27 years? Multiple Choice $63,234.12 $71,335.16 $66,581.29 $77,757.61

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donna p.