Numerade

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A student dissolves 16.g of stilbene C14H12 in 250.mL of a solvent with a density of 0.87/gmL . The student notices that the volume of the solvent does not change when the stilbene dissolves in it. Calculate the molarity and molality of the student's solution. Round both of your answers to 2 significant digits.

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Write the domain and range of the function in interval notation. \[ q(x)=2 x^{2}-12 x+2 \] Select one: a. Domain: $ [-16, \infty) $ Range: $ (-\infty, \infty) $ b. Domain: $ (-\infty, \infty) $ Range: $ (-\infty,-16] $ c. Domain : $ [0, \infty) $ Range: $ (\infty, \infty) $ d. Domain: $ (-\infty, \infty) $ Range: $ [-16, \infty) $

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Pepsin is an enzyme that breaks down protein in the stomach. The pH of the stomach can be as low as 1-2. In order for pepsin to break down protein in a solution with a starting pH of 7.4, you must Group of answer choices Add salt Add base Add ATP Add acid Add glucose

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You are starting a unit on economics. To understand supply and demand you facilitate a conversation for the students about what they would buy if they had $100. You know there will be a variety of answers so you encourage your students to A. consider one another's ideas. B. convince their peers that their idea is best. C. find a friend with a similar idea so they can relate to one another. D. pair and share.

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$f(t) = \begin{cases} 2 & \text{if } 0 < t < 1\\ \frac{1}{2}t^2 & \text{if } 1 < t < \frac{1}{2}\pi\\ \cos t & \text{if } t > \frac{1}{2}\pi. \end{cases}$

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According to the Bureau of Labor Statistics, the average hourly wage in the United States was $26.84 in April 2018. To confirm this wage, a random sample of 35 hourly workers was selected during the month. The average wage for this sample was $25.35. Assume the standard deviation of wages for the country is $4.60. Solve the following manually: a) Are the results of this sample consistent with the claim made by the Bureau of Labor Statistics using a 95% confidence interval? (10 Points) Hint: calculate a 95% confidence interval and check if it includes the average published by the Bureau. b) What is the margin of error for this sample? (5 Points) c) With a 95% confidence level, what is the minimum sample size needed to reduce the margin of error to 1? Round the result to the nearest higher integer. (10 Points) d) Verify your answers using Excel.

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Find the volume of the solid generated by revolving the region bounded by the parabola $y = -\frac{x^2}{9}$ and the line $y = -1$ about the following lines. a. The line $y = -1$ b. The line $y = -2$ c. The line $y = 1$

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Classify each molecule as polar or nonpolar. Polar Nonpolar H H SO$_2$ Answer Bank CO$_2$

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What will be the height of a balanced full binary tree with 128 leaves? Assume the height of the root is 1. * 8 ? 7 ? 5 ? 6 1 point

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Which is the major product of the reaction? OH $H_2SO_4$ A B A B

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