Log Practice

log₂32=3x

• 5/3

• 3/5

• 5

• 3

log_x1000=3

• 1

• 10

• 30

• 3

log₈(4x+4)=2

• 15

• 12

• 10

• 3

log₈₁x = 3/4

• 2

• 3

• 27

• 81

Log with a base "e" (log_e) is the same thing as...

• "e"
• Natural Logarithm (LN)
• Common Logarithm (Log)
• Natural Log, base "e"
  LN_e

Change to Logarithmic Form:
5³ = 125

• log ₅ 125 = 3
• log ₃ 125 = 5
• log ₅ 3 =125
• log₁₂₅ 3 = 5

lnx = -3

• 8.1548

• -8.1548

• 0.0498

• -0.0498

log₆(2x + 3) = 3

• x = 106.5
• x = 100
• x = 16
• x = 50

Find the time required for an investment of $1000 to grow to $5000 at an interest rate of 8% per year compounded monthly. (round to nearest year)

• 1 year
• 242 years
• 20 years
• 13 years

June bugs are tripling in number each week. If there are currently 300 June Bugs in the backyard, when will there be 8100 June Bugs?

• 2 weeks

• 3 weeks

• 300 weeks

• 27 weeks