Sunday

September 21, 2014

September 21, 2014

Total # Posts: 746

**help with chem biochem**

Ethanol + NAD+ ----> acetaldehyde + NADH + H+
*September 11, 2013*

**help with chem biochem **

Ethanol + NAD+ acetaldehyde + NADH + H+ You have a 1 ml solution containing 100 uM Ethanol, and 1 mM NAD+. You then add 1 mg of alcohol dehydrogenase. Assume all of the ethanol gets converted to acetaldehyde. a) What will the final concentration of ...
*September 11, 2013*

**Math**

A 120m cable TV tower casts a 96m shadow. Find the height of a nearby telephone pole that cast a 16m shadow.
*August 27, 2013*

**Physics**

An olympic sprinter can run 100yd in 9.0s. At the same rate, how long would it take the sprinter to run 100m?
*July 9, 2013*

**Statistics**

They all was wrong on (B).
*June 29, 2013*

**Statistics**

Use the following table to answer the questions. (Give your answers correct to two decimal places.) x 1 1 3 3 5 5 7 7 9 9 y 3 2 6 1 3 3 3 2 5 3 (a) Find the equation of the line of best fit. y hat = 2.6+.1x (b) Find the ordinates y hat for the points on the line of best fit ...
*June 29, 2013*

**statistic check**

Sorry but that answer is wrong also..
*June 29, 2013*

**statistic check**

Find the critical value for the hypothesis test, given the following. (Give your answer correct to two decimal places.) Ha: ó1 > ó2, with n1 = 8, n2 = 10, and á = 0.025 F = 2.60 is what I got.
*June 29, 2013*

**statistics**

I think so
*June 29, 2013*

**statistics**

Sorry this is not right
*June 29, 2013*

**statistics**

I tried the F test calculator and that does not give me the answers that are needed. I have looked for one for critical region and have been unable to find one at this time.
*June 29, 2013*

**statistics**

The population (in millions) and the violent crime rate (per 1000) were recorded for 10 metropolitan areas. The data are shown in the following table. Do these data provide evidence to reject the null hypothesis that ƒÏ = 0 in favor of ƒÏ ‚ 0 at...
*June 29, 2013*

**math**

Find the critical value for the hypothesis test, given the following. (Give your answer correct to two decimal places.) Ha: ó1 > ó2, with n1 = 8, n2 = 10, and á = 0.025 F = 2.24 is what I got.
*June 29, 2013*

**math**

Consider the following ANOVA experiments. (Give your answers correct to two decimal places.) (a) Determine the critical region and critical value that are used in the classical approach for testing the null hypothesis Ho: ì1 = ì2 = ì3 = ì4 = ì...
*June 29, 2013*

**math check**

This will most likely be my last question that I have to post, I wanted to think everyone that has helped me and my friends when we had questions. This is a great site that helps when in need. Again Thank you all!!!!
*June 28, 2013*

**math check**

Find the critical value for the hypothesis test, given the following. (Give your answer correct to two decimal places.) Ha: ó1 > ó2, with n1 = 8, n2 = 10, and á = 0.025 F = 2.6 .
*June 28, 2013*

**math check**

Consider the following ANOVA experiments. (Give your answers correct to two decimal places.) (a) Determine the critical region and critical value that are used in the classical approach for testing the null hypothesis Ho: ì1 = ì2 = ì3 = ì4, with n...
*June 28, 2013*

**Math**

So on B I got the answers, 0.5, 1.5, 2.5,3.5,4.5 And everything that I have tried on C is coming up wrong????
*June 28, 2013*

**Math**

I got the first part the answers were 2.6 and .1x, I can not figure out the rest of it B & C.
*June 28, 2013*

**Math**

Use the following table to answer the questions. (Give your answers correct to two decimal places.) x 1 1 3 3 5 5 7 7 9 9 y 3 2 6 1 3 3 3 2 5 3 (a) Find the equation of the line of best fit. y hat = 2.6,.1x Correct: Your answer is correct. . + Correct: Your answer is correct...
*June 28, 2013*

**Math**

Use the following table to answer the questions. (Give your answers correct to two decimal places.) x 1 1 3 3 5 5 7 7 9 9 y 3 2 6 1 3 3 3 2 5 3 (a) Find the equation of the line of best fit. y hat = + x (ii) Graph this equation on a scatter diagram. (Do this on paper. Your ...
*June 28, 2013*

**Math**

In a survey of families in which both parents work, one of the questions asked was, "Have you refused a job, promotion, or transfer because it would mean less time with your family?" A total of 200 men and 200 women were asked this question. "Yes" was the ...
*June 28, 2013*

**Math**

Consider the following ANOVA experiments. (Give your answers correct to two decimal places.) (a) Determine the critical region and critical value that are used in the classical approach for testing the null hypothesis Ho: ì1 = ì2 = ì3 = ì4 = ì...
*June 27, 2013*

**Math**

Sorry the r value..
*June 27, 2013*

**Math**

Population and crime rate?
*June 27, 2013*

**Math**

The population (in millions) and the violent crime rate (per 1000) were recorded for 10 metropolitan areas. The data are shown in the following table. Do these data provide evidence to reject the null hypothesis that ƒÏ = 0 in favor of ƒÏ ‚ 0 at...
*June 27, 2013*

**math**

Sorry it keeps going together Samples are G & H N =386, 414 X =327, 321
*June 27, 2013*

**math**

Sample n x G 386 327 H 414 321
*June 27, 2013*

**math**

Find the value of z that would be used to test the difference between the proportions, given the following. (Use G - H. Give your answer correct to two decimal places.) Sample n x G 386 327 H 414 321 .
*June 27, 2013*

**Math**

Find the value of t for the difference between two means based on an assumption of normality and this information about two samples. (Use sample 1 - sample 2. Give your answer correct to two decimal places.) Sample Number Mean Std. Dev. 1 25 38.6 13.7 2 29 42.1 10.2 .
*June 27, 2013*

**Math**

I came up with -114.80229
*June 26, 2013*

**Math**

Find the value of t for the difference between two means based on an assumption of normality and this information about two samples. (Use sample 1 - sample 2. Give your answer correct to two decimal places.) Sample Number Mean Std. Dev. 1 25 38.6 13.7 2 29 42.1 10.2
*June 26, 2013*

**Math**

Find the value of z that would be used to test the difference between the proportions, given the following. (Use G - H. Give your answer correct to two decimal places.) Sample n x G 386 327 H 414 321
*June 26, 2013*

**Statistics Help**

Consider the following ANOVA experiments. (Give your answers correct to two decimal places.) (b) Determine the critical region and critical value that are used in the classical approach for testing the null hypothesis Ho: ì1 = ì2 = ì3 = ì4 = ì...
*June 26, 2013*

**Statistic help**

Use the following table to answer the questions. (Give your answers correct to two decimal places.) x 1 1 3 3 5 5 7 7 9 9 y 3 2 6 1 3 3 3 2 5 3 (a) Find the equation of the line of best fit. y hat = + x (ii) Graph this equation on a scatter diagram. (Do this on paper. Your ...
*June 26, 2013*

**math**

Thanks, but those are wrong also.
*June 26, 2013*

**math**

Those was not the right answers, the ones that I had got previous was also close to them.
*June 26, 2013*

**math**

Find the 95% confidence interval for the difference between two means based on this information about two samples. Assume independent samples from normal populations. (Use conservative degrees of freedom.) (Give your answers correct to two decimal places.) Sample Number Mean ...
*June 26, 2013*

**math check**

Find the critical value for the hypothesis test, given the following. (Give your answer correct to two decimal places.) Ha: ó1 > ó2, with n1 = 8, n2 = 10, and á = 0.025 F = 2.24 is what I got .
*June 26, 2013*

**Math check**

Find the value of z that would be used to test the difference between the proportions, given the following. (Use G - H. Give your answer correct to two decimal places.) Sample n x G 386 327 H 414 321 2.71 was my answer. .
*June 26, 2013*

**math help**

Use the following table to answer the questions. (Give your answers correct to two decimal places.) x 1 1 3 3 5 5 7 7 9 9 y 3 2 6 1 3 3 3 2 5 3 (a) Find the equation of the line of best fit. y hat = + x (ii) Graph this equation on a scatter diagram. (Do this on paper. Your ...
*June 26, 2013*

**Math question**

How do you find the p-value, on a problem like below. The corrosive effects of various soils on coated and uncoated steel pipe was tested by using a dependent sampling plan. The data collected are summarized below, where d is the amount of corrosion on the coated portion ...
*June 25, 2013*

**Statistics check**

what do you mean with stat oldest L1, etc. Have a question I have a TI-83 Plus calculator, is there a way of putting in the information to get the p value or do you still have to look at a chart. When I read the instructions on it, it mentioned finding the z value to get to ...
*June 25, 2013*

**statistics**

Consider the following ANOVA experiments. (Give your answers correct to two decimal places.) (a) Determine the critical region and critical value that are used in the classical approach for testing the null hypothesis Ho: ì1 = ì2 = ì3 = ì4 = ì...
*June 25, 2013*

**Statistics**

Find the value of z that would be used to test the difference between the proportions, given the following. (Use G - H. Give your answer correct to two decimal places.) Sample n x G 386 327 H 414 321
*June 25, 2013*

**math**

But how do you get the p-value, I have worked it out by hand and also put into calculator and it comes up wrong. 0.0017 was the last answer I got. and 0.9991 before that. I have several questions like this asking for p-value so if you could work one out and I could use as an ...
*June 25, 2013*

**statistics help**

Complete the hypothesis test with alternative hypothesis ƒÊd ‚ 0 based on the paired data that follows and d = O - Y. Use ƒ¿ = 0.01. Assume normality. Oldest 188 174 192 196 65 Youngest 186 168 199 199 69 (a) Find t. (Give your answer correct ...
*June 24, 2013*

**statistics**

I have worked it out and found the t value as 3.80 and that came out right but the p value is not coming out right.
*June 24, 2013*

**statistics check**

Consider the following bivariate data. Point A B C D E F G H I J x 3 4 2 1 7 2 1 0 4 2 y 1 7 3 3 6 6 5 0 6 2 (b) Calculate the covariance. (Give your answer correct to two decimal places.) 5.35 was my answer . (c) Calculate sx and sy. (Give your answers correct to three ...
*June 23, 2013*

**statistics**

So this is what I came up with on (b) 6.93 and (c) 6.48 and those were wrong. I think I am missing them at the beginning when k-1=?-1 and n-k=?-?. Which graph or table are you getting these from? I figure out the other one to come up with the answers but I must of missed the ...
*June 23, 2013*

**statistics**

this is the answers that I got and they were wrong. f>equal to 3.20 for a part and b part I got f>equal to 3.41 But they both are wrong do not thing I am sitting them up right, any help?
*June 23, 2013*

**statistics **

Consider the following ANOVA experiments. (Give your answers correct to two decimal places.) (a) Determine the critical region and critical value that are used in the classical approach for testing the null hypothesis Ho: ì1 = ì2 = ì3 = ì4, with n...
*June 23, 2013*

**statistics**

Consider the following table and use the formulas that are given for computing the correlation coefficient. (Give your answer correct to two decimal places.) x 1 1 0 0 0 y 7 3 5 6 6 r = n xy − x y n x2 − x 2 n y2 − y 2 (1) r = SS(xy) SS(x) · SS(y) (2) ...
*June 23, 2013*

**statistics**

Consider the following set of data. (18, 12), (29, 48), (65, 29), (82, 24), (115, 56), (124, 13) (a) Calculate the covariance of the set of data. (Give your answer correct to two decimal places.) . (b) Calculate the standard deviation of the six x-values and the standard ...
*June 23, 2013*

**statistics**

this is what I done and it was wrong mean of x = 2.6 sd = 2.01108, y mean 3.9, sd 2.42441; then I added the sd 4.43549/(2.011080)(2.42441) = 5.3471 c. I just added all the x together = 26 sy = 39 The formula for 13.2 is r=covar(xto the 1power and y to 1power)= covar (x,y)/Sx X...
*June 23, 2013*

**statistics**

Consider the following bivariate data. Point A B C D E F G H I J x 3 4 2 1 7 2 1 0 4 2 y 1 7 3 3 6 6 5 0 6 2 (b) Calculate the covariance. (Give your answer correct to two decimal places.) (c) Calculate sx and sy. (Give your answers correct to three decimal places.) sx = sy...
*June 23, 2013*

**log equation**

2logt + 1/4[logt + 3logp]
*May 16, 2013*

**accounting 206**

cleveland metals uses a job cost and applies factory overhead to production at a predetermined rate of 180% of direct labor cost. data pertaining to recent operations follow
*April 29, 2013*

**chemistery**

you have 2.00kg of KCL dissolved in 0.600L of H2O what is the percent solution of KCL(w/v)?
*April 24, 2013*

**english**

what are some nongovernmential organization
*April 17, 2013*

**algebra1**

a baseball is hit into the air. the path of the ball can be described by the equation h=23t-5tsquared, where h is the height in meters, and t is the time in seconds. how high is the ball after 3 seconds?
*April 11, 2013*

**algebra.. PLEASE help me!!**

hard
*April 11, 2013*

**accounting 205**

compute the following items for lone pine company for 20x2, rounding all calculations to two decimal places when necessary
*April 8, 2013*

**Colelge Math (Fibonacci)**

2,048
*April 4, 2013*

**Colelge Math (Fibonacci)**

72
*April 4, 2013*

**chemistry**

the equilibrium constant for the synthesis of HBr(g0 from hydrogen and bromine gas is 2.18*10 exponent 6 at 730 degrees celcius.if 3.75 mol of HBr(g) is put into a 15L reaction vessel,calculate the concentration of H2,Br2 and HBr at equilibrium
*April 2, 2013*

**acc. 205**

partner investments, journal entries. The LP partnership was formed on January 1,19X7, by investments from bill levy and marv parcells. levy contributed $30,000 cash and 80,000 of land. Parcells contributed cash of $50,000 and equipment with a value of $20,000. prepare the ...
*March 29, 2013*

**math**

what is the value of 3^0+3^-2
*March 7, 2013*

**STAT**

Calculate SP (the sum of products of deviations) for the following scores. Note: Both means are decimal values, so the computational formula works well. X Y 0 2 0 1 1 0 2 1 1 2 0 3 Assume a two-tailed test with .05. (Note: The table does not list all the possible df...
*March 3, 2013*

**STAT**

An independent-measures research study compares three treatment conditions with a sample of n = 10 in each condition. The sample means are M1 = 2, M2 = 3, and M3 = 7 a. Compute SS for the set of 3 treatment means. (Use the three means as a set of n = 3 scores and compute SS.) ...
*February 24, 2013*

**Elmentary Math for Teachers II**

A spinner containing 8 numbers is spun. What is the probability of the event that the spinner A.) lands on an odd number? B.)lands on a number divisible by 3? C.)does not land on 5,6, or 7? D.)lands on a number less than 4?
*February 8, 2013*

**Elmentary Math for Teachers II**

From a set of eight marbles, five red and three white, we choose one at random. What are the odds in favor of choosing a red marble?
*February 8, 2013*

**Elmentary Math for Teachers II**

From a set of eight marbles, five red and three white, we choose one at random. What are the odds in favor of choosing a red marble?
*February 8, 2013*

**Elmentary Math for Teachers II**

In a class of seven students, a teacher spins a seven-sectored spinner (with equal-sized sectors) to determine which students to ask questions. Determine about how many times a student can expect to be called on when 100 questions are asked.
*February 8, 2013*

**stat**

Explain why using the t statistic may be an appropriate alternative to using a z-score
*February 5, 2013*

**Math **

I need help with this these two problem PLEASE!!! For a population with a mean of μ 80 and a standard deviation of 12, find the z-score corresponding to each of the following samples. a. M 83 for a sample of n 4 scores b. M 83 for a sample of...
*February 1, 2013*

**Math **

If the population standard deviation is 8, how large a sample is necessary to have a standard error that is: a. less than 4 points? b. less than 2 points? c. less than 1 point?
*February 1, 2013*

**chemistry 101**

pls can anybody check my answers
*December 8, 2012*

**chemistry 101**

If 15g of NaOh is dissolved in 285 g of water, calculate the following. Assume the density of the solution is 1.06 g/cc. a) Calculate the moles of NaOH in the solution? My answer is 15gNaOH/40g NaOH= .0375 mole NaOH b) Waht is the mass % w/w of the solution? My answer is 15g ...
*December 8, 2012*

**Math Help**

It takes Andy and Ben the same amount of time to eat 1 large piece of chocolate. It takes Charlotte 3 more mins than Andy and Ben to eat the same piece of chocolate. One day, Andy, Charlotte and Ben share 2 pieces of chocolate among them. It takes them 5 mins to eat 2 pieces ...
*December 2, 2012*

**Basic college Math**

9/2
*December 2, 2012*

**Math**

It takes Andy and Ben the same amount of time to eat 1 large piece of chocolate. It takes Charlotte 3 more mins than Andy and Ben to eat the same piece of chocolate. One day, Andy, Charlotte and Ben share 2 pieces of chocolate among them. It takes them 5 mins to eat 2 pieces ...
*December 2, 2012*

**chem **

1.Can a solution ever have a pH=0? 2.What does pH = 0 suggest about the concentration of the acid? 3.Can the pH ever be negative? 4.What is the significance of a negative pH in a solution? pls need help we didn't cover this in lecture yet.
*November 28, 2012*

**chem **

what would happen to the aacuracy and precision of measurements if the mass is measured to a tenth of a gram instead of a thousandth of a gram?
*November 26, 2012*

**chem**

thanks for the explanation pls is it endothermic or exothermic reaction i'm confused with this
*November 26, 2012*

**chem**

Zn^2+(aq) + 2OH^-(aq) ----> Zn(OH)2(s) a) how the addition of HCl affects the equilibrium? my answer is it will shift to the right b) how the addition of a small amount of NaOh affects the equilibrium?my answer is it will shift to the left c) how the addition of a large ...
*November 26, 2012*

**statistics.. URGENT!! PLZ!!**

The margin of error is: a. the difference between the point estimate and the true value of the population parameter b. the critical value times the standard error of the estimator c. the smallest possible sampling error d. none of the above Complete the following sentences ...
*November 24, 2012*

**chem**

How many grams of KBR, could be recovered by evaporating 650 g of a 15.0% KBr solution of dryness?
*November 21, 2012*

**chem**

When the concentration of I2 is increased to 1.5 M, the ratio of products to reactants is 28. The equilibrium constant for the reaction is 83. In which direction will the reaction shift to regain equilibrium?
*November 19, 2012*

**chem**

The molar concentrations for the reactants and products at equilibrium are found to be [HCl] = 0.80 M, [O2] = 0.20 M, [Cl2] = 3.0 M, and H2O = 3.0 M. What is the value of the equilibrium constant for this reaction? the complete reaction is 4HCl+O2=2Cl2+2H2O i got this answer ...
*November 19, 2012*

**chem**

a.) At equilibrium, the molar concentrations for reactants and products are found to be [I2] = 0.50 M,[Cl2] = 0.60 M, and [ICl] = 5.0 M. What is the equilibrium constant (Kc) for this reaction? b.) The concentration of I2 is increased to 1.5 M, disrupting equilibrium. ...
*November 19, 2012*

**chem**

An 80 proof brandy is 40.0% (v/v) ethyl alcohol. The "proof" is twice the percent concentration of alcohol in the beverage.How many milliliters of alcohol are present in 700mL of brandy?
*November 8, 2012*

**chem**

thanks DrBob222 i already figure out how to do it
*November 8, 2012*

**chem**

Calculate the final concentration of a. 4.0 L of a 4.0 M HNO3 solution is added to water so that the final volume is 8.0L b. Water is added to 0.35L of a 6.0M KOH solution to make 2.0L of a diluted KOH solution. c.A 20.0 mL sample of 8.0% (m/v)NaOH is diluted with water so ...
*November 8, 2012*

**algebra **

The price of a small cabin is $85000 the bank requires a 5% down payment the buyer is offered two mortgage options: 20 year fixed at 9.5% or 30 year fixed at 9.5% calculate the amount of interest paid for each option how much does the buyer save in interest with the 20 year ...
*November 7, 2012*

**chemistry**

Suppose you have 0.500 M sucrose stock solution. How do you prepare 250 mL of 0.348 M sucrose solution ?
*November 7, 2012*

**math**

Question: The price of a home is $180,000. The bank requires a 10% down payment. After the down payment, the balance is financed with a 30 year fixed mortgage at 6.3%. Determine the unpaid balance after ten years. Answer: The unpaid balance after ten years is $136,641.85 I ...
*November 5, 2012*

**chemistry**

a volume of 122mL of argon, Ar, is collected at 500 degrees C and 758 torr. what does this sample weigh?
*November 3, 2012*

**chem**

a volume of 122mL of argon, Ar, is collected at 500 degrees C and 758 torr. what does this sample weigh?
*November 3, 2012*

**CHEM**

what volume would 10.5g of nitrogen gas, N2, occupy at 200.K and 2.02atm?
*November 2, 2012*

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