April 27, 2015
Review Qs
(a) The current population of PEI is 140,200. If the population
is increasing by 2.2% each year, what will the population be in
the year 2050?
(b) The number of bacteria in a culture is doubling every 30
minutes. If the population is currently 100, how many will
there be in 3 hours?
7.3 Solving Exponential Equations (Day 1)
Using what you know of exponent laws, rewrite each expression with an
equivalent expression with base 3.
a)
27
b)
c)
If ax = ay, then x = y.
This means that if the bases are the same an the equality, then
the exponents must also be the same.
April 27, 2015
The "Pizza Delivery Guy" Method of
Solving Exponential Equations
Greco
Greco
Solve each of the following exponential equations by writing
with the same base.
a) b)42x = 16
April 27, 2015
c) d)
e) f)
27-2x = 93x - 2
April 27, 2015
g)
1
625
x
= 1
25
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