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The pores through which leaves exchange atmospheric gases with leaf cells during photosynthesis are the Multiple Choice epidermal cells. stomata. sieve tube elements. petioles. guard cells.

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16. A random sample of students is given a chapter test. Suppose we test the hypothesis that the mean score is higher than 82 points. Given that $X = 86$ points and that the p-value for this test is 0.02, which of the following statements is correct? a. About 2% of students in the sample scored at least 86 points on the test b. About 2% of all students scored 86 points on the test. c. If the population mean is 82 points, then about 2% of all samples this size would show a mean of at least 86 pts d. If the sample mean is 86 points, then there is a 2% chance that the population mean is higher than 82 e. There is about a 2% chance that the null hypothesis is correct. 17. Which of the following could be a correct interpretation for a 95% confidence interval for a proportion? a. We are 95% confident that between 75% and 82% of those surveyed were satisfied with Black Friday prices. b. We are 95% confident that between 75% and 82% of all customers were satisfied with Black Friday prices. c. There is a 95% chance that between 75% and 82% of all customers were satisfied with Black Friday prices. d. 95% of the time between 75% and 82% of all customers are satisfied with Black Friday prices. e. None of these could be a correct interpretation for a 95% confidence interval for the proportion. Use the following table to answer questions 18-20. In a study of 478 fourth, fifth and sixth graders, the following data were collected on their gender and on their primary goal. Good Grades, G Being Popular, P Good at Sports, S Total Male, M Female, F Total 117 50 60 227 130 91 30 251 247 141 90 478 18. What is the probability that a randomly selected student from the study has a goal of "Good grades"? 117 a. b. 478 130 478 c. 247 478 d. 117 e. 247 130 251 19. What is the probability that a randomly selected male from the study has a goal of "Good grades"? 117 117 a. b. 117 c. 478 227 247 478 d. 117 247 e. 130 251 20. What is the probability that a randomly selected student from the study has a goal of good grades or is male? 474 a. b. 478 357 478 c. 117 478 117 d. 117 247 Ae. 227 12

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Strong Entity is always a Parent Entity Question 2Select one: True False

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Becca, a college student, tends to buy the same brands of toothpaste, shampoo, and deodorant. Which of the following is her strongest source of influence in the purchase decision? A. Psychological B. Urgency C. Social D. Personal

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7. Now let's find the Moon's centripetal acceleration and see how it compares to g. You will find the Moon's average orbital velocity, which you can use to calculate the average centripetal acceleration. The first step is to find the circumference of the orbit. The Moon orbits Earth at a radius of 3.85 x 10? m. What is the circumference of the Moon's orbit? Hint: You can use "e" to put your answer in scientific notation. For example, the moon's orbital radius could be typed in as 3.85e8 to mean 3.85 x 10?. We can assume the Moon's orbit is a circle and use C = 2?r to find the circumference of the orbit.

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8. • 7. An infinitely long wire is carrying steady current (i), a circular loop of metal (say copper) lies on the same plane as the straight wire (say plane of the paper). Now the loop starts to move with velocity (v) shown in figure below : case 1 : v and i are antiparallel , case 2 : v and i are perpendicular. In which case there will be an induced current ? (a) Case 1 (b) Case 2 (c) Case 1 and Case 2 both (d) neither in case-1 nor in case-2

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Problem 5: Assume x and y are 4-bit 2's complement signed numbers. Using only the following three 4-bit ripple carry adders and any gates you need, design a circuit that outputs an 8-bit signed number z. The circuit has a control bit S, when S=0 the output z=y+2x, when S=1 the output z=y-2x. Your circuit should produce correct results for all possible input combinations of x and y. (Hint: remember that 2x=x+x) (5 points) X3 X2 X1 Xo X3 X2 X1 Xo A3 A2 A1 A0 B3 B2 B1 B0 Cout 4-bit Ripple Carry Adder Ci S3 S2 S1 So A3 A2 A1 A0 B3 B2 B1 B0 Cout 4-bit Ripple Carry Adder Ci Y3 Y2 Y1 Yo A3 A2 A1 A0 B3 B2 B1 B0 Cout 4-bit Ripple Carry Adder Ci S3 S2 S1 So Z7 Z6 Z5 Z4 S3 S2 S1 So Z7 Z6 Z5 Z4 5

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Question 1 Write Laplace domain simultaneous equations for the rotational mechanical system shown in Fig. 1, in terms of rotational mass angles $\theta_1$ and $\theta_2$. (10 points) $\tau = 10 \cos 6t$ Figure 1

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Problem #2 (15 pts each) A. Show that $exp(m_1x)$, $exp(m_2x)$, and $exp(m_3x)$ are linearly independent functions, where $m_1$, $m_2$, and $m_3$ are not equal and nonzero.

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The early empirical finding that "price elasticity of demand is positive" reflects the fact that medical markets are not in equilibrium. T or F

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mark v.