9.5 Exponential Equations
Solve each equation for x to the nearest hundredth:
a.
b.
c.
d.
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To solve more complicated exponential equations:
1.
2.
3.
2
Example 1: Solve for x:
3
Example 2: Solve for x:
4
Example 3: Solve for x:
5
Example 4: The Iglesias family wants to give the youngest daughter
$20,000 when she is ready for college. They now have $11,500 to
invest. Determine how many years it will take them to achieve their
goal given that they invest this amount at 8.3% compounded monthly.
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Example 5: Mrs. Johnson received a bonus equivalent to 10% of her
yearly salary and has decided to deposit it in a savings account in which
interest is compounded continuously. Her salary is $38,500 per year
and the account pays 7 1/2% interest. How long will it take for her
deposit to double in value?
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