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Why has it proven so difficult to develop a vaccine that is effective against HIV? A cellular immune response is needed, but it would take a live vaccine to achieve this. The virus is surrounded by a capsule and lacks antigenic surface proteins. The virus weakens the immune system so much that the vaccine cannot induce immunity. HIV binds to T cells, but not to B cells, so it is hard to make antibodies against it. The vaccine virus is too small to elicit an immune response.

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6. Which of the following statements are always true, for any sets A and B? (Hint: try a few examples for A and B to see what is true. Also, you might compare P(A+B) and P(A)+P(B), as in the previous exercise.) (i) if A B, then P(A) = P(B) ✓ (ii) if Ac B, then |P(A)| ≤ |P(B)| ✓ (iii) |AB| = |A| + |B| (iv) |AB| = |A| + |B| - |A∩B| ✓ (v) |AuB| = |A| + |B| - |A∩B| (vi) |A∩BI ≤ |AB| (vii) P(AUB) = P(A) บ P(B) บ P(A∩B) (viii) P(A+B) = (P(A) u P(B)) - P(A∩B) ✓ (ix) P(A+B) = P(AUB) - P(A∩B) (x) P(A)+P(B) = (P(A) u P(B)) - P(A∩B) ✓ (xi) P(A)+P(B) = P(AUB) - P(A∩B) 0/5

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When working with a programming language, a name is? Choose the most correct answer. Question 44 options: 1) Variable that has some way to identify it in the given language 2) Subprogram (function, procedure, method, etc.) reference that is translated to an address 3) Any entity in a program that might need to be used elsewhere in the program 4) String of characters used to identify some entity of a program

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3. Consider the following production function: q = f(Z1,Z2) = Z?$^{1/4}$Z?$^{1/2}$ Assuming that the price of the output is p and the prices of inputs are w? and W?, respectively. ?????? a) State the firm's profit maximization problem. (2 marks) b) Derive the firm's factor demand functions, Z? and Z?. (10 marks) c) Derive the firm's supply function. (3 marks) d) Derive the profit function. (3 marks) e) Verify Hotelling's lemma for q(w,p), Z?(w,p) and Z?(w,p) (6 marks)

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Cats can see low-frequency, low-contrast objects better than humans. If your cat is staring at something you cannot see, it is likely a.

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Which law enforcement focus did Hurricane Katrina temporarily displace in favor of improved police responses to natural disasters? a. anti-terrorism efforts b. broken windows policing c. community partnerships d. training improvements

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before 5. An article was purchased for? 1239 including GST of 18%. Find the price of the article before GST was added? 7.4 Compound Interest You might have come across statements like "one year interest for FD (fixed deposit) in

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What role should politicians and lawmakers play in union votes such as the one in Chattanooga? Do lawmakers have a vested interest in the success of businesses within their legislative territory?

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7. The partially saturated sample at the terminal condition in problem 3 (P<sub>c</sub> = 100 psi) was used in a dynamic displacement experiment where water was injected at a fixed injection pressure of 4 atmospheres with the outlet open to the room (1 atm) until only water was flowing. Water viscosity is 1 cp. Oil viscosity, if needed, is 5 cp. The core permeability is 2.0 Darcies. $Q = \frac{k_r k_\text{A\Delta p}}{\mu} \implies k_r = \frac{Q\mu}{k_\text{A\Delta p}}$ with Q [cm³/sec], k[Darcies], ?[cp], A[cm²], ?p[atm], L[cm] a. (5 points) Compute the final saturation given that 8.1 cm³ of oil was produced. b. (5 points) Compute the relative permeability for brine and oil at this terminal saturation given the final water effluent rate is 2 cm³/sec. (make sure you use consistent units) $k_{ro} = $ $k_{rw} = $

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Given that y = ((x^2 + 3))/(x - 1), show that for real values of x, y cannot lie between -2 and 6. Find the turning points and sketch the curve.

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judy c.