1. Warm-up: Exponent Laws
Use exponent Laws to simplify each of the following:
a) x3x2 b) y2y-4 c) (d5)-2
d) e) f)

2. Exponential Equations
LG: I can evaluate exponential equations

3. Exponential Equations
a = initial value
b = growth/decay factor
b > 1 = Growth (y-values get progressively bigger)
b < 1 = Decay (y-values get progressively smaller)

4. Example 1: A strain of bacteria currently has a population of 124 cells and doubles every hour.
What do x and y represent?
Is this growth or decay?
How many cells will be present in 4 hours? 2 hours ago?
How would the equation change if the strain of bacteria began with 62 cells and tripled every hour?

5. Example 2: Evaluating Expressions with Exponents
Evaluate when a = 1, b = -2, and c = 3 (a-2b)(a3b4)
Simplify, then sub in given values

6. Example 3: Evaluating Expressions with Exponents
Evaluate when a = -3 and b = 4 (a5b2)3 (2a2b)5
Simplify, then sub in given values

7. Practice
Pg # 7-10, 12, 14