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susan m--iz

susan m.

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Simplify the expression (1)/(x 3)-(1)/(x 4) Simplify the expression $$ \frac{1}{x+3} - \frac{1}{x+4} $$

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Which of the parameter estimates are statistically significant at the 1% significance level? b. C. All the parameter estimates are statistically significant. All parameter estimates except 6 are statistically significant. significant. d. â is not statistically significant, but all the rest of the parameter estimates are significant. ê is not statistically significant, but all the rest of the parameter estimates are 22. When output is 40 units, what is average total cost? a. $360 b. $480 $200 d. e. $520 $280 23. When output is 20 units, what is average total cost? a. b. $160 $200 C. $280 d. $340 e. $360 24. A probability distribution is as follows: A variable has the value of 20 with the probability of 0.40 and value of -10 with the probability of 0.60. What is the expected(average) value and its standard deviation?

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When selecting and scaling the process input variables for an experiment, which of the following is a desirable approach? Group of answer choices Include as many factors as possible Set factor levels at extreme settings Combine process measurement responses when possible Be bold, but not foolish, is selecting high and low factor levels

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34) Anja decides to track how long it takes her to get to school each day. After tracking her drive five times, Anja finds that it takes her an average of 27 minutes to get to school each day. The quickest Anja can get to school, if she encounters no traffic, is in 23 minutes. If on the first day, Anja drove to school in 31 minutes, what is the longest possible time it took Anja to drive to School during those five days?

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3. Find the volume of the solid obtained by rotating the region bounded by $y = x^2 - 4x + 5$, $x = 1$, $x = 4$ and the $x$-axis about the $x$-axis. (a) Get a sketch of the bounding region (We don't need a picture perfect sketch of the curves we just need something that will allow us to get a feel for what the bounded region looks like so we can get a quick sketch of the solid.) (b) Sketch the solid obtained by rotating the region about $x$-axis. (c) Sketch cross section we cut the solid at any $x$. (d) Find the cross-sectional area. (e) Determine the limits of integration. (f) Calculate the volume of this solid.

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2.105 A 12-lb circular plate of 7-in. radius is supported as shown by three wires, each of 25-in. length. Determine the tension in each wire, knowing that $\alpha = 30^\circ$

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In this problem you may use without proof the fact that $sin(\sqrt{t})u(t)$ has Fourier transform $\frac{\sqrt{\pi}}{2(j\omega)^{3/2}}e^{-1/(4j\omega)}$. (a) (10 pts.) Determine the Fourier transform of $2sin(\sqrt{t-3})u(t-3)$.

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3. (30 points) Given the following function, when $r$ is a 1 x 60 vector with linearly spaced values from 0 to 1.7 and $\theta$ is a 1 x 73 vector with linearly spaced values from 0 to $2\pi$: $x = r \cos(\theta)$ $y = r \sin(\theta)$ $z = -e^{-r} \cos(4x) \cos(4y)$ Evaluate the function at every combination of the given $r$ and $\theta$ vectors. Create two 3D surface plots of $z$, one using $r$ and $\theta$ as the independent variables, and one using $x$ and $y$ as the independent variables. Place the two plots in the same figure using subplot.

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Q// The basketball player likes to release his foul shots an initial speed $v_0 = 6$ m/s. What values of the initial angle $\theta$ will cause the ball to pass through the center of the rim? Neglect clearance considerations as the ball passes over the front portion of the rim.

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A Wheatstone bridge has P = 3.5 kΩ, Q = 7 kΩ, and a galvanometer null is obtained when S = 5.51 kΩ. P and Q have accuracies of +0.05% and S has an accuracy of +0.1%. Calculate the accuracy of the measured resistance of R and its upper and lower limits for the P, Q, and S values stated.

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