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brian brewer

brian b.

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A chemistry graduate student is given 250. mL of a 0.80M diethylamine ((CH,), NH) solution. Diethylamine is a weak base with K, = 1.3 \times 103Whatmass of C,Hs) NHyBr should the student dissolve in the (CHs) NH solution to turn it into a buffer with pH = 10.74?You may assume that the volume of the solution doesn't change when the (C,Hs) NH, Br is dissolved in it. Be sure your answer has a unit symbol, and round it to 2 significant digits.

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Question 3 0.5 pts What was the original theory, that the brain was made up of one continuous set of tissue that branched out in different directions? the neural lattice the nerve net the brain block the tissue tapestry

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The polar coordinates of a point are given. Find the rectangular coordinates of this point.\\ $\left(5, \frac{7\pi}{6}\right)$\\What are the rectangular coordinates of this point?\\ (Type an ordered pair. Simplify your answer, including any radicals. Rationalize all denominators. Use integers or fractions for any numbers in the expression.)

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Efficiency and Undesirable Outcomes You are playing the Ultimatum Game as the Proposer. You must decide how to split $45 and can only choose whole dollar amounts. You did some research and learned that Responders typically reject offers of 25 percent or less but accept offers of more than 25 percent. If your goal is to maximize your payoff, how much should you offer? Please round your final answer to the nearest dollar. Group of answer choices $12 $0 $45 $11.25

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When a population is finite, the formula that determines the standard error of the mean $\sigma_{\bar{x}}$ needs to be adjusted. If N is the size of the population and n is the size of the sample (where n$\geq$0.05N), then the standard error of the mean is $\sigma_{\bar{x}} = \frac{\sigma}{\sqrt{n}} \sqrt{\frac{N-n}{N-1}}$. The expression $\sqrt{\frac{N-n}{N-1}}$ is called the finite population correction factor. Use the finite population correction factor to construct the confidence interval for the population mean described below. c = 0.80 x = 16.5 $\sigma$ = 1.5 N = 400 n = 49 The 80% confidence interval for the population mean is ( (Round to two decimal places as needed.)

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Anna's husband is about to walk the dogs but cannot find the leashes. Knowing she was the last to walk the dogs, he asks her where she put them. Anna thinks back to when she came back inside with the dogs, how it was raining so she had to put the umbrella away. And then she remembers – the leashes are with the umbrella. At what level of awareness was this information for Anna, prior to her husband's question? Question 10 options: implicit memory conscious preconscious unconscious

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Enter the correct answer in the box. If $x \neq 0$, what is the sum of $4\sqrt[3]{x^{10}} + 5x^3\sqrt[3]{8x}$ in simplest form?

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Use the Hermes dataset to answer these questions: For black (color category) bags, is the average hammer price higher for matte or shiny finishes? Hint: Use the Text to Columns feature to extract "finish" into its own column! Question 1 options: Matte is higher Shiny is higher

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#include <iostream> using namespace std; int main() { // A pointer to a pointer to a const int const int** ptr1 = new int*; // A const pointer to a pointer to an int int** const ptr2 = new int*; // A pointer to a pointer to a const int const int** ptr3= new const int*; // A pointer to a pointer to a const int const int** ptr4 = new int const*; // A pointer to a pointer to a const int const int** ptr5 new int* const; /* Error: Yes */ /* Error: No */ /* Error: No */ /* Error: No */ /* Error: Yes */ // To evaluate the correctness of the following statements, you may // assume that the incorrect statements (if any) are fixed so that all // pointer variables declared above are correctly allocated. *ptr1 = new int; **ptr1 = 1; *ptr2 = new int; **ptr2 = 2; *ptr3 = new int; **ptr3 = 3; *ptr4= new int; **ptr4 = 4; *ptr5 = new int; **ptr5 = 5; /* Error: Yes */ /* Error: No */ /* Error: Yes */ /* Error: Yes */ /* Error: Yes */ // Assume memory de-allocations are purposely not done here. return 0; }

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Chapter 5 Fourier Series 1) Find a Fourier series to represent f(x) = x - x² from x = -? to x = +? Hence show $\frac{1}{1^2} - \frac{1}{2^2} + \frac{1}{3^2} - \frac{1}{4^2} = \frac{?^2}{12}$ 2) Obtain the Fourier Series for the Function f(x) = x² -? < x < ? 3) Find the Fourier Series to represent f(x) = e<sup>dx</sup> in the interval -? < x < ? 4) Find the Fourier Series to represent f(x) = |x|, -? < x < ? 5) Find the Fourier Series of f(x) = ? from x = -c to x = c.

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