Evaluate Logarithms
log <--> exp
Product, Quotient, Power Rules
Change of Base Rule
Solve Exponential Equations
100

Evaluate the logarithm log44

1

100

Rewrite 81 = 34 in logarithmic form

log381=4

100

Expand log4(3y)

log43 + log4y

100

Rewrite log3(a) * log(3) in the form log(c)

log(a)

100

Solve the equation for t. Round your answer to the nearest thousandth. 

11 * 105t = 20

0.052

200

Evaluate the logarithm log381

4

200

Rewrite 1000=103 in logarithmic form

log(1000)=3

or

log101000=3

200

Expand log9(x7)

7log9(x)

200

Evaluate ln(8) / ln(2)

3

200

Solve the equation for t. Round your answer to the nearest thousandth.

7 * e0.1t = 47

19.042

300

Evaluate the logarithm log21024

10

300

Rewrite 49(1/2)=7 in logarithmic form

log497=(1/2)

300

Expand ln(7/3)

ln(7) - ln(3)

300

Rewrite log9(m) / log(m)

1 / log(9)

300

Solve the equation for m. Express the solution as a logarithm in base-10.

5 * 10(m/4) = 32

4log(32/5)

400

Evaluate the logarithm log279

2/3

400

Rewrite log48=(3/2) in exponential form

4(3/2)=8

400

Rewrite log(6) - log(3) in the form log(c)

log(2)

400

Rewrite log4(m) * logm(20) in the form logb(c)

log4(20)

400

Solve the equation for y. Express the solution in exact form.

-100 * 20.5y = -5

log2(1/20) / 0.5

or

2log2(1/20)

500

Evaluate the logarithm log(1/3)81

-4

500

Rewrite log381=4 in exponential form

34=81

500

Rewrite 3log(5) in the form log(c)

log(125)

500

Evaluate 6log7(681) to the nearest hundredth

20.115

500

Solve the equation for t. Express the solution in exact form.

8 * 5(-t/9) = 346

-9log5(173)

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