Numerade

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Try Again Your answer is incorrect. A certain substance decomposes according to a continuous exponential decay model. To begin an experiment, the initial amount of the substance is 2200 kg. After 6 hours, 1518 kg of the substance is left. (a) Let t be the time (in hours) since the beginning of the experiment, and let y be the amount of the substance (in kg) at time t. Write a formula relating y to t. Use exact expressions to fill in the missing parts of the formula. Do not use approximations. y = $\Box e^{\Box t}$ (b) How much of the substance is left 23 hours after the beginning of the experiment? Do not round any intermediate computations, and round your answer to the nearest whole number. $\Box$ kg Explanation Recheck

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Problem 3. Let $f(z) = u(x, y) + v(x, y)i$ be a C-differentiable function. Assume that $u(x,y) = C \in \mathbb{R}$ is a constant function. Prove that $f(z)$ is also a constant function. Problem 4. Find all values of $z \in \mathbb{C}$ such that: (a) $e^z = 1 + \sqrt{3}i$. (b) $e^z = -2$. (c) $e^z = 1 + i$. (d) $e^{2z+1} = 1$.

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50. Two invertebrates phyla are a) Protozoa and thallophyta b) Protozoa and mammalia c) Mollusks and arthropoda d) Protozoa and pteridophyta e) Coelenterates and bryophytes 51. Monera include a) Brown algae and bacteria b) Blue-green algae and bacteria c) Brown algae and protozoa d) Blue-green algae and protozoa e) Bacteria and protozoa 52. The smallest known cells are a) Protozoa b) Blue-green algae c) Algae d) Fungi

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Question 1 (1 point) ? Saved How do most people read text on websites? Word for word. The same way they read paper text. They scan the screen for what interests them or for what they need. Most people don't read the text on websites. They prefer to look at images.

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5. Consider the function $f(x, y) = (x^3 + y^3)$. Use the definition of differentiability to check if this function is differentiable at the origin. 6. Around the point (0, 1), is $f(x, y) = x^2(y + 1)$ more sensitive to changes in $x$, or to changes in $y$? Give reasons for your answer.

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23. Use the three-phase diagram for a common ("generic") substance in the space below to construct a diagram with the following constraints: The X-axis should show a range of temperatures from 0°C to 150°C. The Y-axis should show a range of pressures from 0 atm to 5 atm. Label the phase fields (regions), boundary curves with phase changes (i.e. melting), triple point, critical point. Draw an X at a starting point where P = 3 atm and T = 125°C. Describe the path (what happens to the substance) that this sample takes as it cools to 25°C and drops to P= 1 atm. Be sure to be specific about the T & P conditions where it changes phase. (15)

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$\dot{y}_1(t)$ $B_1$ $f_1(t)$ $v_2(t)$ $f_2(t)$ $m_1$ $m_2$ $K_2$ $K_1$ For the system shown in figure, $f_1(t)$ and $f_2(t)$ are inputs. $y_1(t)$ and $y_2(t)$ are outputs. Formulate the mathematical model of the system. Only write dwon the laplace transformed equations.

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tempts: Score: 1 5. Chapter mank07t, Section .193, Problem 094 Which of the following actions best illustrates adverse selection? A. After obtaining automobile insurance a person drives less carefully than before. B. A person dislikes losing $400 more than he likes winning $400. C. A person purposely chooses bonds of corporations with high default risk because of the high returns. D. A person intending to take up dangerous hobbies applies for life insurance.

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7. -/1.48 points SerPSE10 16.3.OP.019. Each end of a string with $\mu = 3.00$ g/m is attached to two opposite walls. The distance between the walls is $\frac{3}{4}$ the length of the string. A block of mass $m$ hangs from the middle of the string. Neglect the mass of the string in calculating the tension. (a) Find an expression for the transverse wave speed in the string as a function of the mass of the block. (Use the following as necessary: $m$. Do not include units in your answer. Assume that $m$ is measured in kg and $v$ is measured in m/s.) $v = $ (b) What is the mass of the block (in kg) if the wave speed is 34.0 m/s? kg

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50 ? 10 ? + v1 - + v0 - 10 ? v3 4i0 + 250 V (+ i1 io i2 0.2v0 i3 + 40 ? Answer the following questions about the circuit. The KVL loop equation for the loop labeled i1 is: In terms of the mesh currents, the equation to calculate the value of the dependent current source is: The constraints equation for this circuit would be: In terms of the mesh currents, the equation to calculate the value of the dependent voltage source is: The KVL loop equation for the loop labeled i2 is: The Supermesh equation for this circuit would be: The KVL loop equation for the loop labeled i3 is: Jump to... You are logged in as Rita Brikho (Logout) 11148 5050??? Loop i2 is part of a supermesh, so KVL would not be completed around the i2 loop 0.2*10(-12) -250+50*i1+10(i1-i2)+0.2*10*i2 No Constraints equations are needed 0.2*10*i2 -250+50*i1+10(i1-i2)-4(i1-i2)+40*i3 i1-i3=0.2*10*i2 There are no supermeshes needed for this problem 4(i1-i2)-i2-i3 4(i2-i1) Loop i1 is part of a supermesh, so KVL would not be completed around the i1 loop Loop i3 is part of a supermesh, so KVL would not be completed around the i3 loop i1-250 10(i2-i1)+10*i2-4(i1-i2) -0.2*10*i2-4(i1-i2)+40*i3 Upload

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juan c.