Warm up
Powers and Exponents
Chapter 3 Lesson 2
Miss Piggy starting saving money by putting
a dollar in her piggy bank, then doubling
the amount she saves each week.
Complete the table.
week 0
1
2
3
4
5
6
weekly
2
1
savings
total
1
3
savings
How many 2's are multiplied to find her savings in
week 4? week 5?
Write each expression using exponents.
1) (­2)(­2)(­2)(3)(3)=
2) a .b . b .a . b
3)
Evaluate
( (
­2
3
4
Got it? try...
(­ 1/5)3
4)The deck of a skateboard has an area of
about 25 . 7 square inches. What is the area
.
of the skateboard
deck?
*remember area of a rectangle is l x w
Got it? A basketball court has an area of
23 . 3 . 52 .7 square feet. What is the area?
Substitution: Evaluate each expression if
a=3 and b=5.
5) a2 + b4
6) (a ­ b)2
Got it? you try...
if c = ­4 and d = 9, find
c3 + d2
­4
(c + d)3
d3 ­ (c2 ­ 2)
9
­64 + 81
17
Homework~
Textbook page 179 (1­12)