1. A certain type of bacteria reproduces at a rate of 10·10·10 per hour.
WARM-UP
A certain type of bacteria reproduces at a rate of 10·10·10 per hour.
1) Write this rate in exponential form.
2) What is the rate per hour in standard form?
103
10· 10· 10 = 1000 per hour
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2. NOTES: Squares and Square Roots
Square – The product of a number and itself.
Perfect Square – Product of a whole number multiplied to itself.
Square Root – The factors multiplied to get a perfect square.
- symbol that means “find square root”
1.5 x 1.5 = 2.25
1.5
1.5
5 x 5 = 25
= 5

3. Examples: Squares and Square Roots
1) Find the square of 3.
2) Find the square of 15.
3) Find the square of the image below.
3·3 = 9
15·15 =
225 7
Square of 7 = 49 7
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4. Examples: Squares and Square Roots
4) Find =
5) Find =
6) Find the square root of this picture. 9
(9·9=81) 14
(14·14=196)
8 x 8 = 64
A = 64
So, = 8
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5. Examples: Squares and Square Roots
7) The infield of a baseball diamond is a square with an area of 8100 sq. feet. What are the dimensions of the infield?
Remember: To find area of square, you multiply the two equal sides.
To go backwards and find the equal sides – Find Square Root! = 90 ?
(90x90 = 8100)
A = 8100 ?
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6. HOMEWORK: Squares and Square Roots
Bookwork:
Page 36
#11-29 odd,
30, 35, 40-42, 46
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