Posted by **Vision/Help!** on Saturday, November 3, 2007 at 10:03am.

Part 1: Suppose that the number of new homes built, H, in a city over a period of time, t, is graphed on a rectangular coordinate system where time is on the horizontal axis. Suppose that the number of homes built can be modeled by an exponential function, H= p * at , where p is the number of new homes built in the first year recorded. If you were a homebuilder looking for work, would you prefer that the value of a to be between 0 and 1 or larger than 1? Explain your reasoning.

Typing hint: Type formula above as H = p * a^t

Part 2: Using the Library, web resources, and/or other materials, find the logarithmic formula that gives the pH of a substance. State what each variable in your equation represents.

Find the pH factor of a substance of your choice. Is this substance acidic or basic? Why?

Using this pH, show how to find the hydrogen ion content of the substance using the formula. Round to 10 decimal places or write your answer using scientific notation. Include units on your answer.

Typing hint: 2.3 * 10^4 is an example of a number typed in scientific notation.

Be sure to reference all sources using APA style.

- College Algebra -
**bobpursley**, Saturday, November 3, 2007 at 10:12am
If a fraction is taken to a power, the value decreases. (1/2)^2 is 1/4

pH=-log(H+) where (H+) is the hydrogen ion concetnration in moles/liter.

Search on google

pH vinegar

- College Algebra -
**Helen**, Monday, November 5, 2007 at 11:49am
NO ONE ANSWER THIS QUESITON!!! I can't believe you are trying to get someone to do your AIU homework for you!!!!

- College Algebra -
**Joe Bob**, Sunday, June 1, 2008 at 8:35am
Helen, how about you STFU and stop trying to block people from receiving help. Sometimes the best way to get a grip on algebra is to see the problem worked out and try and duplicate the result. Last I checked, this site is HOMEWORK HELP.

- College Algebra -
**Alex**, Monday, July 6, 2009 at 2:03pm
If you want to help by showing the problem then don't say what the substance is and make up a ph for this problem that way they don't copy it right from here and get graded on plagerism. That way your not aiding a cheater and they are seeing how to do the math.

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