Trig Review

Exponential Equations

100

Solve for x

4^3x+1=8^x-1

x=-5/3

200

The y value is rounded to the nearest tenth, solve for x

76.5=x(1.15)⁸

x=25

300

The Compound Interest Formula is A(t)=P(1+r/n)^nt

You deposit 8,500 into an account that pays 1.80% annual interest. Find the balance after 7 years when the interest in compounded semi-annually.

$9050.18

The Natural Base e

100

Simplify the expression

27e⁷/3e⁴

9e³

200

7007.07=Pe^.05*10

Solve for x

x=4250

300

You deposit $10,000 into an account that pays 6% interest, compounded continuously. Find the balance after 10 years.

$18,221.19

Find the inverse

100

8^2/3=4

log₈4=2/3

200

log₁₂12=1

12¹=12

300

log₄1=0

4⁰=1

Evaluate the Log

100

log₂₇3

1/3

200

ln 0.75

-.2877

300

log₄64

3

Solving Exponential and Logarithmic Equations

100

Solve for x.

log(5x-1) = log(20-x)

x=7/2

200

Solve for x. Write your answer in log form.

6^x = 42

x=log₆42

300

Solve for x. 

log(x+2) + log(8) = 2

x=21/2