Numerade

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Two separate tests are designed to measure a student's ability to solve problems. Several students are randomly selected to take both tests and the results are shown below. \begin{tabular}{|l|l|l|l|} \hline Test A & 4 & 5 & 3 \\ \hline Test B & 3 & 7 & 5 \\ \hline \end{tabular} Find the value of the linear correlation coefficient $ r $. Round to two decimal places. a. None of the other choices is correct b. -0.60 c. 0.60 d. 0.50 e. -0.50

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Clear my choice The carbon atoms in saturated hydrocarbons ________. Select one: Oa. contain at least one triple bond Ob. contain at least one double bond Oc. contain a benzene ring Od. contain both a double and a triple bond Oe. have only single bonds

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Given that $f''(x) = \cos(x)$, $f'(\frac{\pi}{2}) = 5$ and $f(\frac{\pi}{2}) = 11$ find: $f'(x) =$ $f(x) = $

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Calculate the standard entropy change for the following reaction at 25.0 °C. Round your answer to 4 significant digits. 2 Al (s) + 3 FeO (s) ? Al$_2$O$_3$ (s) + 3 Fe (s) Note: Reference the Thermodynamic properties of pure substance table for additional information. J K \cdot mol

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Question 1 Not yet answered The algorithm shown below, finds: Algorithm: Marked out of 3.00 Start Flag question 1- assume x = 0 to 10 2- for all x values \cdot calculate y1 = 3 \cdot e^{2x} \cdot calculate y2 = sin(x) End Select one: a. only calculate the values of 2 functions y1, y2 b. finds random values of y1, y2 c. calculate the values of functions y1, y2 and plots them with x values d. nothing

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17 2 points Precipitation hardening is conducted under what general condition? held at melt temperature for several hours and then air cooled held at elevated temperature for several hours and then quenched held at elevated temperature for several hours and annealed held at elevated temperature for several hours and allowed to air cool 18 2 points Estimate the yield strength of a steel (in MPa with 1 decimal place) with a grain size of 50 µm, given 320 and 370 MPa have been measured for the same material with grain sizes of 20 and 10 µm, respectively. Type your answer.... 19 2 points Corrosion is driven by (select all that apply) ? Second Law of Thermodynamics First law of thermodynamics ?Flow of electrons and ions Pressure A need to reach equilibrium with the environment 20 2 points The reaction that yields two solid phases on cooling a single solid phase is called

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5. (15 pts) The function $f(x, y, z) = xz + y'z' + yz'$ a) Determine the minimum sum-of-product expression for the function. b) Show the logic circuit for the expression you found in a).

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10. Answer one of the following: a. Compute $\iint_D \text{curl}\vec{F} \cdot d\vec{S}$ over the surface D which is given by the paraboloid $z = 4 - x^2 - y^2$ above the x-y plane. For this computation, use the information that $\iint_H \text{curl}\vec{F} \cdot d\vec{S} = 12$ over the surface H which is given by the hemisphere $x^2 + y^2 + z^2 = 4$ above the x-y plane. -OR- b. Compute $\iint_S \vec{F} \cdot d\vec{S}$ given that $\text{div}\vec{F} = 0$

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PLEASE SOLVE USING MATLAB CODE! PLEASE SOLVE USING MATLAB CODE! PLEASE SOLVE USING MATLAB CODE! Example 1: A large tank holds 350 gallons of brine solution with 38 lbs. of salt. A concentration of 2 lbs./gal is pumped in at a rate of 4 gal/min. The concentration leaving the tank is pumped out at a rate of 3 gal/min. How much salt is in the tank after 15 min? Brine q1= 4 gal/min C1 = 2 lbs./gal 350 gal brine 38 lbs salt Brine qo = 3 gal/min Co when t = 0, Q = 38 lbs. t = 15, Q = ?

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Show that each of the following languages is context-free by giving either a context-free grammar or a stack machine for it. Include an explanation of each grammar or machine. (What is each symbol for? etc) (a) Balanced sets of matching parentheses and curly braces. Each "(" must match a ")" that comes later and each "{" must match a "}" that comes later. (b) Words of 0s, 1s, and 2s such that exactly half the characters are 2s and all of them are in the last half of the word. (So all words in the language have even length.) (c) Invocations of printf with integer variables where the number of format specifications (the %d groups) equals the number of variables passed as arguments. Assume that â—¦ is a terminal denoting a variable, ? is a terminal representing a character not part of an input specification, and that no sizes are given for any of the input specifications (i.e. each input specification is exactly "%d"). For example, the following is a valid word: printf("%d%d? ? ? ? ? ? ?%d??", â—¦, â—¦, â—¦);

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kyle w.