Note 2.5 Problem Solving Skills: Quantity and Cost

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Note 2.5 Problem Solving Skills Quantity and
Cost
Problem Solving!

• Our goal is to use formulas for area and
  perimeter to solve problems.

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Example 1 Write P or A to tell if you would use
perimeter or area to find the following.

• Amount of Fencing
• Amount of wallpaper border
• Amount of carpet
• Amount of fabric in a quilt.
• Amount of lace strip to decorate the edges of a
  lace handkerchief.

P
P
A
A
P
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Example 2 Solve the Problem

• Landscaping The rectangular park needs to be
  enclosed by a fence covered with sod.
• How many yards of fencing need to be ordered?
• The sod costs 1.10/yd2 and is ordered by the
  square yard. Find the total cost of sod to cover
  the entire park.

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Use one of these formulas to solve each problem.
1.
2.
3.
4.
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Example 3

• How many feet of ceiling molding will she need?
• If 1-ft by 1-ft tiles that cost 1.75 each are
  used, what is the cost of tiling area I?
• If 1-ft by 1-ft carpet squares that cost 2.99
  are used, what is the cost of carpeting area II?

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Homework 2.5 Pg. 73 6-27 all
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Solutions to Example 3
Who is a Math Genius?