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david long

david l.

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Which ordered pair is a solution to the system of linear equations? 2x+3y=6 -3x+5y=10

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Which of these symptoms results from nitrate exposure? Increased blood pressure Increased heart rate Headaches Increased heart rate and headaches Increased blood pressure and increased heart rate

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which of the following topics are more likely to be studied by a macroeconomist the effect of taxes on the prices of airline tickets

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The text appears to be free of spelling, typographical, grammatical, OCR, and mathematical errors. The formatting is clear and coherent.

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4 E coli Plate 5 Antibiotic Antibiotic Code Antibiotic Mechanism Zone of Inhibition Measurement (mm) S/I/R Amoxicillin AMC 7 Cephalothin CF 8 Chloramphenicol C 30 mm 9 Ciprofloxacin CIP 10 Clindamycin CC 11 Erythromycin E 12 Oxacillin O 13 Penicillin G 14 S. aureus P 15 Other P 16 Streptomycin S 17 Tetracycline TE 18 Tobramycin TM 19 Trimethoprim sulfa SXT

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+ \(v_b\) - ? ? + 8? + 12 V 8 ? 8? \(i_b\) ? \(r_ib\) g \(v_b\)

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Question 1 [20 points] The McTavish weather station, located near the corner of McTavish Street and Docteur Penfield, measures the weather several times over a protracted period. For this question, you must write a program that accepts multiple lines of comma-separated numbers, where each number is a sensor reading. Your program should ask for the readings repeatedly until the user enters "stop" on a single line. Then, your program should print, on one line, the minimum, maximum and average value of all of the sensor readings, as shown in the examples below. You must print the three float values with only 2 decimal places. See the recent lecture slides on string formatting to learn how to do this. You must use a loop to ask the user to enter the readings, and use a list to store the readings. When you calculate the minimum, maximum and average of the readings in the list, you are allowed to use built-in functions this time. However, you must not use invalid inputs in your calculation of the minimum, maximum and average. For example, if the user entered 30 readings in total, and 5 of them were invalid, then the minimum, maximum and average must be calculated from the 25 valid readings, ignoring the 5 invalid ones. An invalid input is defined as being either less than -70, or greater than +50 degrees. If all sensor readings given by the user are invalid, the program must print "Really broken sensor!" instead of printing the three values.

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1. What is "the myth of the pristine environment"? 2. The article portrays disagreement, based on recent findings, over the degree of wildness in places like the Amazon. Could this be, in part, due to different views of what wild means? What are different definitions of "wild" that might concur with different views presented in the article? 3. The author poses the question "how did scientists get things so wrong for so long?" Does the information in the article convince you that, in fact, scientists have been wrong? If so, what evidence do you find most compelling? If not, what further questions would you like answered? 4. The author states that "by inadvertently wiping out the Indian populations, it was the Europeans who created the modern Amazon rainforest." Do you think there were analogous historical situations in North America? What sort of evidence would you look for? 5. If there are no pristine environments, what should conservation biologists use as ecological benchmarks when making management decisions?

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2. Perform the following tasks: (a) Evaluate the integral: $\iint_{\mathbb{R}^2} e^{-x^2 - y^2} dA$ (b) Use your answer to part (a) to evaluate the integral: $\int_{-\infty}^{\infty} e^{-x^2} dx$ (Hint: $\int_a^b \int_c^d f(x)g(y) dx dy = \int_a^b g(y) dy \int_c^d f(x) dx)$

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The general solution to the differential equation $y''' - y'' = 0$ is I. $y = c_1e^x + c_2xe^x + c_3$ II. $y = c_1 + c_2x + c_3e^x$ III. $y = c_1e^x + c_2e^{-x} + c_3$ IV. $y = e^x(c_1cosx + c_2sinx) + c_3$ V. $y = c_1e^xsinx + c_2x + c_3$ Select one: a. III b. I c. IV d. II e. V

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