Chapter 1: Number Sense Name
Section 3: Real Numbers Date
Topics in Algebra 1 © 2001 Texas Instruments Student Worksheet 1-29
³
Try-It!
é
on Your TI
.
83 Plus or TI-73
(continued)
Word Problem: Jose and Maria’s Backyard Pool
Jose and Maria have a circular pool in their backyard. Their parents
would like to make a cover for the pool. They bought a square piece of
material whose sides are the same length as the diameter of the pool.
The diameter of the pool is 3.5 meters.
1. How much material will they have left over? Find the exact and approximate answers. Use the
calculator. Show all your work. (See Hints below.)
2. Exact answer:
3. Approximate answer (to 3 decimal places):
Calculator Hints:
•
Use
Float = 3
on your calculator to display 3 decimal places.
•
Press
-
„
to find the calculator's approximation for
p
.
Math Hints:
•
Area of a square: A = s
2
, where s is the length of the sides of the square.
•
Area of a circle: A =
p
r
2
, where r is the radius of the circle (diameter = 2r).
3.5 meters
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