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edward cruz

edward c.

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Suppose a pharmaceutical company is designing an experiment to test their new allergy medication. They divide the 200 subjects by gender and then randomly assign the men and women to either receive the medication or a placebo. What purpose does blocking by gender serve? Choose the correct answer below. OA. Blocking insures that individuals do not adjust their behavior in some way to the treatment they are receiving. B. Blocking insures that the effect of a treatment is not due to some characteristic of a single experimental unit. OC. Blocking insures that the effect of factors whose levels cannot be controlled is minimized. OD. Blocking reduces the variability in the response variable and removes potential confounding caused by gender.

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There are 569 identical plastic chips numbered 1 through 569 in a box what is the probability of reaching into the box and randomly drawing a chip number that is smaller than 478

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Sammy and Jimmy are twin brothers. Each gets a weekly allowance of $2. Sammy’s preferences for baseball cards (quantity denoted as x) and “famous economists” cards (quantity denoted as y) can be represented by the utility function u(x, y) = xy. Suppose that both goods are $1 per unit, and x and y can be any non-negative real numbers. (a) (2 pts) Solve for Sammy’s optimal consumption bundle. (b) (3 pts) Suppose the price for baseball cards, px, rises to $2. What is Sammy’s new optimal consumption bundle? (c) (5 pts) How much would his parents have to increase his allowance in order to leave him exactly as well off as he was originally? Save your final result to 2 decimal points. (d) (4 pts) Jimmy’s preferences are represented by v(x, y) = ln(x) + ln(y). Answer questions (a), (b), and (c) for Jimmy. Compare the result with Sammy. Explain why you have such a result.

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Anna Rehearse started her practice as a design consultant, Rehearse Design, on April 1, 2022. During the first month of operations, the business completed the following transactions: Apr 1 Received $25,000 and gave capital to Rehearse. 5 Purchased supplies, $1,000, and furniture, $3,000 on account. 10 Performed design services for a client on account, $2,500. 15 Paid $5,000 cash to acquire computer equipment. 20 Paid for the furniture purchased on account. 22 Received cash on account, $1,250. 25 Prepared a design for a school, receiving cash $1,500 30 Paid secretary salary $1,200. 30 Paid office rent expense, $2,000, and utilties $500. 30 Rehearse withdrew cash of $4,000. Required: 1. Journalize the transactions noted above. 2. Open T-accounts for the accounts affected by the transactions noted above. Post the transactions to the T-accounts. Label the balance of each account Bal. 3. Prepared the trial balance as of April 30, 2022. 4. Determine if the company was profitable for the Month of April. Net Income? $ OR Net Loss? $

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which of the following health claims can be used on food labels: A) a diet high in calcium is linked to a reduced risk of osteoporosis B) A diet low in sodium may help lower blood pressure C) all of the above D) A diet in total fat may reduce the risk of cancer

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1. \begin{equation*} A = \begin{pmatrix} 2 & 1 \\ 1 & 2 \end{pmatrix}, P = I \end{equation*}For the linear system $Ax = b$ write Richardson's method in componentwise or matrix form using the given preconditioner matrix and find optimal step(parameter).

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9.22 (Exam prep) A 12 g bullet travelling at 400 m/s strikes a suspended wooden block (ballistic pendulum) of mass 2.4 kg. The length of the string is 0.95 m. The bullet passes through the block and emerges with a speed of 100 m/s. (a) What is the maximum angle of the string to the vertical? Ans: 28.5°. (b) How much work was done by the bullet on the block? Ans: 2.7 J. (c) How much work is done by the block on the bullet? Ans: -900 J. (d) If energy is conserved, why do your answers for parts b) and c) not add up to zero? Ans: some energy is dissipated as heat. L $\theta$ Figure 9.22

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Find both the number of combinations and the number of permutations for 10 objects taken 4 at a time. Express your answer in exact simplest form. There are ___ combinations and ___ permutations.

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QUESTION 7 Match the attacks with appropriate countermeasures. Note it is possible that one countermeasure maps to more then one attack. Client attack Server attack Eavesdropping Replay Chosen Protocol attack Sybil attack Double spending 51% attack A. limited attempts B. Password hashing C. Multifactor authentication D. Challenge response protocol E. Use unique identifier for the authenticated or signed operation F. Create a cost for registering as a user G. Proof of work

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Peter wants to choose how much proteins P and carbs C to consume to maximize total nutritional value calculated with the formula: $N(P, C) = P^{2/3}C^{1/3}$, subject to not exceeding 2400 calories. Proteins have 4 calories per unit, while carbs only 2 calories per unit. The combination of protein (P) and carb (C) consumption that maximizes nutritional value (N) while respecting the 2400 calorie limit is: Select one: ? a. None of the other answers b. P=400 and C=400 c. P=0 and C=1200 d. P=600 and C=0 e. P=300 and C=200

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