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isabel shepherd

isabel s.

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Jump to level 1 A poll reported 69% support for a statewide election with a margin of error of 2.16 percentage points. How many voters should be sampled for a 99% confidence interval? Round up to the nearest whole number. Ex: 1234 voters

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amount of charges in a wire. rate at which charge moves through a wire. rate of collisions between charges in a wire. meter of length of a wire. square meter of cross section of a wire. cubic meter of volume of a wire. Current is the Current density is the current per Reset Help

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2. (This question is meant to be solved without a calculator.) A coffee pot has the shape of a cylinder with a radius of 5 inches, as shown in the figure below. Let $h$ be the depth of the coffee in the pot, measured in inches, where $h$ is a function of time $t$, measured in seconds. The volume $V$ of coffee in the pot is changing at a rate of $-5\pi\sqrt{h}$ in$^2$/sec. a) Show that $\frac{dh}{dt} = -\frac{\sqrt{h}}{5}$. b) Given that $h = 17$ at time $t = 0$, solve the differential equation $\frac{dh}{dt} = -\frac{\sqrt{h}}{5}$ for $h$ as a function of $t$. c) At what time $t$ is the coffee pot empty?

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Vertical banded gastroplasty is a surgical procedure that reduces the volume of the stomach for weight loss. In a study, 90 patients with Type 2 diabetes underwent this procedure, 68 of whom experienced a recovery from diabetes. You, a surgeon, claim that more than 65% of those with diabetes who undergo this surgery in the population will recover from diabetes. What is the P-value for testing this claim? Do you reject or not reject $H_0$? Use a significance level of $\alpha = 0.05$. State what the result means in this context in a sentence. \newline P-Value = 0.18 > 0.05; Do not reject $H_0$. At 0.05 significance level, there is no evidence to suggest that more than 65% of those who undergo this surgery will recover from diabetes. \newline P-Value = 0.018 < 0.05; Reject $H_0$. At 0.05 significance level, there is evidence to suggest that more than 65% of those who undergo this surgery will recover from diabetes. \newline P-Value = 0.018 < 0.05; Reject $H_0$. At 0.05 significance level, there is no evidence to suggest that more than 65% of those who undergo this surgery will recover from diabetes.

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A node voltage is defined as the voltage rise from the reference node to a nonreference node. Find $V_A$ and $V_B$ in Figure 4 using this method. (10 marks)

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A property that measures 20 hectares is for sale. a. How large is the property in acres? b. If the property is selling for $ 450 comma 000, what is the price per acre?

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What was the first trait selected for in domesticated graincrops? Why? How does that affect the amount of barley and wheat grown in the US? What crop has increased acreage in OK recently because machine-harvest is now feasible?

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Draw the major organic product for the following reaction? HO OH pTSA - H?O

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Question 1 [5 points] Sanjeev has forgotten the rate of simple interest he earned on a ten-month term deposit at the bank. At the end of the ten-month period, he received interest of $1,327.50 on his $17,700.00 deposit. What annual rate of simple interest did his deposit earn? Note: Please make sure your final answer(s) are in percentage form and are accurate to 2 decimal places. For example 34.56% Annual interest rate = 0.00%

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5) A smart drinks machine will deliver a can upon one of four conditions: • 4 quarters have been entered and the user has pressed any of the flavor buttons (there are 7 flavors) • The user has inserted an accepted card and pressed any of the flavor buttons • The override key has been inserted and the user has pressed any of the flavor buttons • The machine has received an email indicating that the preferred drink should be delivered (notice in this case, no flavor button needs to be pressed) The machine's "deliver" function uses a circuit which you need to design by coming up with the Boolean expression (part a) and then drawing the circuit (part b). Use D to denote the expression (D for deliver). This expression should be a 1 for any of the above conditions. To compute the conditions, we have the following sensors: Q3Q2Q1 is a 3-bit value counting the current number of quarters entered, we need exactly 4 quarters, F3F2F1 is a 3-bit value of which flavor was selected, we want any flavor other than 000, C denotes accepted card inserted, O denotes the override key being inserted and E denotes an email was delivered. a. Provide the reduce/simplified Boolean expression to compute E b. Draw the circuit of the expression from part a.

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