# Posts by Gayla

Total # Posts: 25

**Math**

Solve -12 / 3 * [-8 + (-14)2 – 6] + 2 =

*September 19, 2015*

**Math**

P1V1/T1=P2V2/T2 combined gas law 1.0atm*0.50L/298K=5.0atm*0.50L/T2 Can you help me to go from this step to the solution?

*July 26, 2009*

**College Chemistry**

How many pounds of propane,C3H8, if you pay $20 for a 15L cylinder, filled to 150 psi at 25 degrees C.

*July 25, 2009*

**College Chemistry**

Calculate temperature when 0.50L sample or gas at 1.0 atm and 25degrees C is compressed to 0.05L of gas at 5.0 atm.

*July 25, 2009*

**College Chemistry**

The previous questions that I submitted are still unclear to me as a plug and chug approach does not help me at all. Can you please explain better?

*April 26, 2009*

**chemistry**

The hydornium ion concentration in blood of three different patiens was: Patient [H30+] A 5.0 X 10^-8 B 3.1 X 10^-8 C 3.2 X 10^-8 What is the pH of each patient's blood? If the normal range is 7.30-7.50, which, if any, of these patient's have an abnormal blood pH?

*April 26, 2009*

**College Chemistry**

Calculate both [H30] and [OH-] for a solution that is: pH=5.50 ph=7.00

*April 26, 2009*

**Chemistry**

Calculate [H3O] for a solution of hydrochloric acid that is: pH=2.00 pH=3.00

*April 26, 2009*

**College Algebra**

An amount of $500 was invested in 1970 and the investment grew as shown in the following table. The average rate of change of the investment between 1975 and 1980 is ___ per year. Year 1970 1975 1980 1985 Capital 500 966 1856 3578

*January 29, 2009*

**statistics**

Can people really identify their favorite brand of cola? At a= .05, is the correctness of the prediction different for the two types of cola drinkers? Since it is 2 x 2 table, try also a two-tailes two-sample z test for n1 = n^2 and verify that z2 is the same as your chi-...

*June 23, 2008*

**statistics**

Hearing levels or cockpit noise in an aircraft can damage the hearing of pilots who are exposed to this hazard for many hours. Noise level is described as Low=under 88 decibels, Medium=88-91 decibels, High=92^decibels. At a = .05, is the cockpit noise level independent of ...

*June 23, 2008*

**statistics**

A student team examined parked cars in four different suburban shopping malls. 100 vehicles were examined in each location. At a = .05, does vehicle type vary by mall location? Vehicles Vehicle Somer Oakland Great James Row Type set Lakes town Total Car 44 49 36 64 193 Minivan...

*June 23, 2008*

**statistics**

Sixty-four students in an introductory college economics class were askd how many credits they had earned in college, and how certain they were about their choice of major. At a = .01, is the degree of certainty independent of credits earned? Credits Very Somewhat Very Row ...

*June 23, 2008*

**Statistics**

Thank you for your help.

*June 8, 2008*

**Statistics**

The web based company Oh Baby! has a goal of processing 95% of its orders on the same day they are received. If 485 out of the next 500 orders are processed on the same day, would this prove that they are exceeding their goal, using a = .025?

*June 8, 2008*

**Statistics**

Thank you so very much for your help.

*June 8, 2008*

**Statistics**

An auditor reviewed 25 oral surgery insurance claims from a particular surgical office, determining that the mean out-of-pocker patient billing above the reimbursed amount was $275.66 with a standard deviation of $78.11. (a)at the 5% level of significance, soes this sample ...

*June 8, 2008*

**Statistics**

Thank you for your help.

*June 8, 2008*

**Statistics**

A coin was flipped 60 times and came up heads 38 times. (a)at the .10 level of significance, is the coin biased towards heads? Show your decision rule and calculations. (b) calculate a p-value and interpret it.

*June 8, 2008*

**math-Statistics**

Thanks for all of your help.

*June 8, 2008*

**math-Statistics**

Thanks for explaining the problem in terms that I can understand.

*June 8, 2008*

**math-Statistics**

I need help with the following questions and appreciate any and all help given. 1. Faced with rising fax costs, a firm issued a guideline that transmissions of 10 pages or more should be sent by a 2-day mail instead. Exceptions are allowed, but they want the average to be 10 ...

*June 8, 2008*

**Probability problems - explanation**

Thank you so very much for helping me with the two problems. I can now finish the rest of my homework. Take care and thanks for helping me and other students like me.

*May 21, 2008*

**Probability problems**

Thank you and here is the two problems. 1. A certain airplane has two independent alternators to provide electrical power. The probability that a certain given alternator will fail on a 1-hour flight is .02. What is the probability that (a)both will fail? (b)neither will fail...

*May 21, 2008*

**Probability problems**

I need help with two word problems that have to do with probability. Can someone please help me?

*May 21, 2008*

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