Homework Help

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How to find a mode and Median a of this sequence:{5,8,6,4,5,3,5}Can you help me with this problem, because I didn't get it when we did it in class.Thank-you

I don't know what to do for question ii) .Help me please I'm lost, I don't know where to begin with. I have an exam tomorrow on this topic, so I require a bit of help because I had been sick a lot , so I missed a lot of school, so I missed the topicThanks for answering the question

Hi! For class, we are coming up with an idea and we have some questions: Are there any bacteria stains that are safe for consumption? Is there any difference in DNA between E. Coli and Salmonella? IF so, is there a stain that can detect these 2 bacterias and come out with a different colour for each bacteria detected? Is bacteria stain reusable? For example, if i were to wash it, would i be able to use it again?

Hi all,I have experimental nuclear magnetic resonance data that describe T2-relaxation of the nuclei in the sample of interest. The experimental points obey bi-exponential dependence: I = I1*exp(-t/T2_1) + I2*exp(-t/T2_2), where I is current intensity, I1 and I2 are intensities which represent fractions of two T2 components - T2_1 and T2_2. The purpose is to calculate T2_1 and T2_2. To calculate T2_1 and T2_2, I fit bi-exponential equation mentioned above to experimental data points. But in order to ensure that calculated T2 values are true, I'd like to build semilog graph. For this, I take natural logarithm of experimental intensities, and thus the vertical axis in the g…

I really need someone to start me off with my practical questions. 1. Buffer will be 100ml of 0.25 M Tris buffer with a ph of 8.0. Write out the chemical equation for this buffer. Identify which species is the conjugate acid and conjugate base. 2. For this buffer, calculate the ratio of the base to acid using the Henderson-Hasselbach equation. I don't really know where to begin to be honest. Any help/ info would be so appreciated!

Hi Everyone, I cant get my head around this one, This isn't the question in the assignment but if I knew this one it would help me with answering it. How can you apply bernouilli's equation to solve simple problems associated with pipe and ductwork systems and devices? Any help would be greatly appreciated!

The price in the shop is $ 20 by how much % you how to reduce the price to get 15 So 20= to 100%. if you take away 20 from 15 you get 5 So if you take 100-5 =95 So is it 95% if it is wrong explain please.

In school we learned chemical world and we came across , the word atom . Can anyone define please what atom means? Please Thanks in advance

3x=15 Can you help me with this question please So ,we did it in class but I need a help with them, because I don't know what to do next.Can anybody explain the method so I know it the next time.

I am lost on this. I know the equation 1/DI + 1/DO = 1/F but I don't know how it applies to this. Thanks A 1.9 cm-tall object stands in front of a converging lens. It is desired that a virtual image 2.7 times larger than the object be formed by the lens. How far from the lens (in cm) must the object be placed to accomplish this task, if the final image is located 10 cm from the lens?

Quadrilateral ABCD is inscribed into a circle. AB is a diameter of this circle. BC crosses AD in point E. E is outside the circle. EH is a perpendicular from E to AB. EH crosses CD in point F. G is a middle of CD. Prove that angles ABG and AFD are equal.

A man's income is N 180 000 per anum. He is allowed a tax-free income in the following: personal allowance N 72 000, child allowance N 4 500 for each child under 18 years for a maximum of 4 children, dependent relatives allowance to a maximum of N 18 000. Calculate the amount of tax the man will pay if has 5 children under 18 years and the taxable income is 10% for the first N 20 000, 15 % for over N 20 000 and up to N 40 000, 20% for over 40 000 and up to N 60 000, and 25% for over N 60 000. Here is my work: Man's income = N 180 000 Personal allowance =N 72 000 Child allowance (4 children maximum) = N 4 x N 4 500 = N 18 000 Dependent relatives allowances = N 18 …

39-year-old woman attended her GP complaining of upper abdominal pain. When questioned about the history of the pain, she explained that it became worse after meals and it had been persistent for some time. When asked for any other unusual symptoms, recent weight loss was noted and she explained that she had been experiencing unusually greasy stools, even though she had not changed her diet. When the GP looked further back into the patient’s records, he noted a history of alcohol abuse. Upon questioning, the patient admitted that although she had reduced her intake, she was still having a ‘glass or two’ of wine every evening. The GP requested non-fasting bloods to be…

I am clueless on this one.

Hi, I'm in 12th grade and for my senior project I am doing an observation on the effects copper would have on plant growth. I have used copper sulfate to create increasing concentrations of copper in which I used to water my test plants. What I need some help on is whether copper sulfate can or should have been used in order to test the effects that copper has on the plants. After further research of lately, I found that copper sulfate not only has copper but I've read that it contains sulfur as well. I believe this would ruin the purpose of my experiment as the sulfur may effect the plants. I would appreciate any assistance from someone who has more knowledge …

So I've been stuck on this problem for about three days or so. It involves precipitation and some reaction, but the reaction is not given: "A 1.0 g mixture of magnesium chloride and sodium nitrate is dissolved in water. Then an excess of silver nitrate solution is added and a precipitate is collected and dried. The mass of the precipitate is 1.43 g. What is the percentage of magnesium chloride in the original mixture?" What I have tried so far is to find out the reaction first, then work backwards to find out how much magnesium chloride reacted with the silver nitrate, but none of the answers I have found match the multiple choice answers listed. I really need t…

I am not able to solve this problem as the pulley also has mass. The moment of inertia is I

Hello, I'm designing an experiment in order to compare the combustion of two different fuels (gasoline and vegetable oil) and test the effects on water pH when the produced gases are mixed with distilled water (should produce an acidic solution). This is to sort of simulate acid rain and compare the efficiency of different fuels/their impacts on the environment. I'm setting the amount of distilled water at a constant value for both trials, but I'm not sure how much fuel I should be burning to get the same effect. As of now, I'm thinking of using q = msΔt (inputting the specific heat capacities of the two fuels found online) and finding out what mass of the two fuels …

we are doing a android app project on Augmented Reality Based Interior Designing. we have given proposal as we will offer to user a list of 3D models of different type of Furniture items that the user will able to place 3D model at its desire place through mobile camera to see either the Furniture item that he is placing is good enough for the place or not. The user will able to set all the room through 3D models that we are providing in our Application. The problem is that we are stuck up against one Question that is What is the benefit of this application if the models that we are providing are good for my Place or room So can user get these models in real form...…

OK, a titration question for you here: "In order to determine the aspirin content of a commercial aspirin tablet, a tablet weighing 0.400g was dissolved in aqueous ethanol and titrated with 0.100M NaOH solution: 16.7cm^3 of the NaOH was required to reach the end point. Under the conditions of the titration, only the Carboxylic acid group reacts with the NaOH". Obviously, the question goes on to ask about moles in the aspirin, and the % by mass of aspirin in the tablet, but what I need to know is what is the balanced equation for this reaction? NaOH + COOH -> ? Cheers, Thanks for your help.

Hi all,I’m currently taking a statistics class and very much regretting it as I find in class I understand the concepts initially yet can never seem to apply them or get confused and thus struggle with the basics.I would very much appreciate help with this section of homework questions. For all 4 questions I would assume graph b will be significantly different as the variations is mean is large and there is no overlap between the error bars at all? I'm not sure what difference it makes in part c and d to change from two standard errors to one and then to standard deviation ( I thought standard error was just another way or representing standard deviation for the whole …