Numerade

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Determine the radius and center of the circle. If the equation is not the equation of a circle clearly explain why not. a. x2 + y2 − 6x − 4y − 12 = 0 b. 16x2 + 16y2 − 16x + 8y −11 = 0 c. 2x2 + 2y2 − 3x + 1 = 0

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An engineer has designed a valve that will regulate water pressure on an automobile engine. The valve was tested on 200 engines and the mean pressure was 4.5 pounds/square inch (psi). Assume the population standard deviation is 0.7 . If the valve was designed to produce a mean pressure of 4.4 psi, is there sufficient evidence at the 0.01 level that the valve does not perform to the specifications? Step 3 of 6 : Specify if the test is one-tailed or two-tailed. Answer

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13. A bond issued by the State of Pennsylvania provides a 9% yield. What yield on a Synthetic Chemical Company bond would cause the two bonds to provide the same after-tax rate of return to an investor in the 35% tax bracket? a. 13.85% b. 17.50% c. 7.00% d. 12.50% e. 9.00%

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Which policy tool uses market signals rather than direct orders to reduce negative externalities?

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Does the relation represent a function? A. Yes, because each element in the first set corresponds to exactly one element in the second set. B. No, because each element in the first set does not correspond to exactly one element in the second set. C. No, because an element in the second set corresponds to multiple elements in the first set. D. Yes, because each element in the second set corresponds to exactly one element in the first set.

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Find the degree of the term $-5x^8$: Find the degree of the term $-2x^9$: Find the degree of the term $-4$: Find the degree of the term $-1x^6$: Find the degree of the polynomial $-5x^8 - 2x^9 - 4 - 1x^6$:

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14 The consumers that the CPI is based on does not include: 01:58:58 Multiple Choice the unemployed. the retired. persons in prison. The CPI does not include any of these.

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Could you help me solve questions 1 through 6 using the data provided? Do not do graphs for number one as I have already done them. Thank you in advance. Model Membrane Questions: 1. Plot voltage vs. position for both intracellular and extracellular recordings. 2. Is the maximum voltage the same for both types of recording? Why or why not? For help answering this and the next two questions, refer to Video 1.1 Current Flow, and note that the voltmeter measures the difference in potential between the positive and negative electrodes. The extracellular recording changed polarity when the battery passed the electrodes. Why? Why did this not happen with the intracellular recording? What happened to the extracellular recording when the battery was between the voltmeter electrodes? Why? Describe the decay of the voltage from its peak in the intracellular recording. 3. Calculate a space constant from the measured voltages (solve for A in Equation 4, Passive Spread, where V1 is the voltage measured when the battery was at the recording site and V2 is the voltage measured when the battery was x nodes away from the recording site). Compare this value with one calculated from the resistances using Equation 3. Space Constant = R1 / (R1 + R2). R1 is 10 k, R2 is 1 k, and R3 is 100 in the model membrane. In the model and in real biological membranes, R3 is so small compared to the other resistances that it can usually be ignored. How would an increase or decrease in R1 or R2 affect the spread of voltage in a neuron (Explain using Equation 3. Space Constant = (R1 / (R1 + R2)). Why is this even depends on the spread of electrical current along an axon) important to consider? (Hint: Think about how action potential conduction velocity of the cell's total resistance which includes membrane, axoplasmic, and extracellular resistance. How could you measure this value in the model membrane? Why is this an important consideration? (Hint: You could calculate R1 by Equation Ohm's Law, E=IR.) Data: Space Constant Position Intracellular Extracellular 1 1.842V 10.5 mV 2 2.562V 42.1 mV max: 35.0mV 3 3.550V 205.6 mV 4 9.350V 5.0 mV 5 9.350V -0.90mV 6 0.180 -395 mV 7 4.930V -284.5mV 8 3.560V 10 -205.4mV 9 2.50V 147.8 mV 10 8.1 100.4mV

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If desired aggregate expenditure is greater than actual national income, then Question 19 options: none of the answers are correct. actual national income must be less then equilibrium level. actual national income must be greater then equilibrium level. inventories will likely begin to rise, causing firms to reduce production.

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Some ordered pairs are listed in the table below. Complete parts a) and b) below. \begin{tabular}{|c|c|c|c|c|c|c|} \hline x & 0 & 5 & 8 & 10 & 12 & 14 \\ \hline y & 12 & 5 & 3 & 1 & 3 & 12 \\ \hline \end{tabular} a) Plot the data points shown in the table. Choose the correct graph on the right. b) Is there a linear relationship between $x$ and $y$? Explain. A. Yes, because $x$ and $y$ are described accurately by a nonvertical line. B. No, because $x$ and $y$ are not described accurately by a nonvertical line.

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