Idaho Society of Professional Engineers

           PO Box 170239, Boise, ID 83717-0239  208-426-0636  Fax: 208-426-0639  E-Mail: ispe@idahospe.org

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Idaho Society of Professional Engineers
Friday Update – 10/26/07

UPCOMING EVENTS:

FUTURE CITY JUDGES NEEDED!!
The 4th Annual Idaho Future City is right around the corner and volunteers are needed to help judge each team's city on the day of competition (Jan 12, 2008). There approximately 30 registered schools (from Idaho, Utah & Oregon) and we expect approximately 40-45 entries to be judged. A description of the presentation and city model judging aspects are here.
The Future City Competition is an educational program for 7th and 8th graders where they design a city using SimCity software, make a scale model of part of their city, write an essay, and give a presentation on their city. An engineer mentor works with the team during the preparation for the competition. In its 16th year nationally, the Future City Competition is a proven program that helps encourage students to pursue engineering careers and helps teachers meet science, math, social studies, arts, and language art curriculum requirements.
If you are interested in judging either the presentation or city models on the day of competition, please contact Erika Stoddard (Erika.Stoddard@itd.idaho.gov). Additional information on Idaho's Future City Competition as well as the National level of competition can be found at www.futurecityidaho.org or www.futurecity.org.

UPCOMING EDUCATION SESSION
From Engineer to Manager to Leader: Tools to Advance Your Career
November 6, 1:30–3:00 E.S.T.
Mick Morrissey, Principal, Morrissey Goodale LLC

ISPE SINCERELY APPRECIATES THE SUPPORT OF ALL OF OUR CURRENT SUSTAINING ORGANIZATIONS:

AHJ Engineers, PC
B & A Engineers, Inc

Briggs Engineering Inc
Delta Engineering Group
Elkhorn Engineers
G & S Structural Engineers
J.M. Miller Engineering, Inc
J-U-B Engineers, Inc
Kittelson & Associates Inc
Land Solutions, Land Surveying & Consulting
Mason & Stanfield, Inc
Materials Testing & Inspection
MWH
Progressive Engineering Group, Inc
Quadrant Consulting, Inc
Rational Technology of Idaho, LLC
Riedesel Engineering, Inc
Schiess & Associates
Stapley Engineering
Terracon
TerraGraphics Environmental Engineering, Inc
Walker Engineering

Please consider joining these great companies in becoming an ISPE Sustaining Organization. ISPE offers the Sustaining Organization category of membership to enhance the visibility of your commitment to ISPE and the engineering profession. Your membership will allow us to better serve the engineering community through promoting engineering and ethics, and supporting the needs of the engineer including professional development.

If you are interested in becoming a Sustaining Organization, please contact the ISPE office at ispe@idahospe.org.

MATHCOUNTS PROBLEM OF THE WEEK
Can you solve this MATHCOUNTS problem? The answer will appear in next week's edition of the Friday Update!

School Lunch
The lunch room workers at Walt Disney Elementary School can move a total of 600 students through 5 lunch lines in exactly one hour. How many students move through each lunch line per minute?
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Bobby, Juliana and Michael have worked out a bartering system for trading their school lunch snacks. They decided that 10 carrot sticks are equal to 1 apple, 1 apple is equal to 20 potato chips (1/2 of a grab bag) and 1 grab bag of chips is equal to 1 pudding cup. In their system, apples and pudding cups may not be divided into pieces for bartering purposes. Juliana has 15 carrot sticks and 1 apple in her lunch. What must she give Michael in order to get his pudding cup?
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At Guffey Middle School lunch can be purchased al a carte. There are 5 main dish options, 6 side item options and 4 drink options. Jennifer will have 1 main dish item, 2 different side items and 1 drink for lunch. How many combinations are possible for Jennifer’s lunch?

Answer to last week’s MATHCOUNTS problem:
Since the question asks for the number of combinations of distinct leaf types we are looking for groups of leaves where each leaf is different from the other leaves in the group and order does not matter. This means the group {yellow hickory, red oak, orange maple} is the same as {red oak, yellow hickory, orange maple.}

To solve this we can simply make an organized list. (Let yellow hickory = yh, red oak = ro, orange maple = om and yellow willow = yw.)

yh, ro, om ro, om, yw

yh, ro, yw

yh, om, yw

There are 4 possible distinct combinations.

Another way to solve this is to see that for each possible grouping of three distinct leaf types, one of the types is left out. There are three possible types to leave out, which means there are four possible combinations.
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To solve this first find the area of the entire property.

50ft × 80ft = 4000 square feet

Now calculate the area of the region that will not need to be raked (house & garage) and subtract it from the area of the entire property.

(30ft × 40ft) + (10ft × 15ft) = 1200 sq. feet + 150 sq. feet = 1350 sq. feet

4000 sq feet – 1350 sq feet = 2650 sq feet
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First calculate the number of bags used last year.

2650 sq feet ÷ 10 = 265

This year he experienced a 5% increase in the number of bags needed.

265 × 0.05 = 13.25; or 14 bags since you can’t use only part of a bag (a bag is either used or it isn’t.)

Add this to the number of bags he used last year to find the total number of bags used.

265 + 14 = 279 bags

Now we just subtract the number of bags used from the total number of bags Alex purchased.

300 – 279 = 21 bags
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$500 ÷ $0.05 = 10,000 square feet

If you want to see last week's problem again, click

http://www.mathcounts.org/webarticles/anmviewer.asp?a=1115&z=110


Idaho Society of Professional Engineers
PO Box 170239
Boise, ID 83717-0239
208-426-0636
Fax: 208-426-0639
E-Mail: ispe@idahospe.org
Web Site: www.Idahospe.org
 

ISPE MATHCOUNTS Program

 National Engineers Week - Future City Competition

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