Logarithms Intro

Rewrite log₂8 = 3 in exponential form.

• 2⁸ = 3
• 2³ = 8
• 3² = 8
• 8³ = 2

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CCSS.HSF.BF.B.5

Rewrite log_pt = m in exponential form.

• p^t = m
• t^m = p
• m^t = p
• p^m = t

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CCSS.HSF.BF.B.5

Rewrite 3⁴ = 81 in logarithmic form.

• log₃4 = 81
• log₈₁3 = 4
• log₃81 = 4
• log₄81 = 3

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CCSS.HSF.BF.B.5

Change to Logarithmic Form:
12² = 144

• log ₂ 144 = 12
• log ₁₂ 144 = 2
• log ₁₂ 2 = 144
• log ₂ 12 = 144

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CCSS.HSF.BF.B.5

Solve for x.
log₅25 = x

• 2
• 5
• 125
• 0.2

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CCSS.HSF.BF.B.5

Solve for x.
log₅ 1 = x

• 0
• -1
• 2
• 1

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CCSS.HSF.BF.B.5

• H
• F
• G
• J

• F
• G
• H
• J

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CCSS.HSF.BF.B.5

Solve for x.

• 390,625
• 1250
• 312.5
• 25

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CCSS.HSF.BF.B.5

The school lawn is being overtaken by geese.  If there are 12 geese on Monday, and the number of geese increases by 30% every day, how many are there in 2 weeks?

• 12(0.30)¹⁴
• 12(0.30)²
• 12(1.30)¹⁴
• 12(1.30)²

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CCSS.HSF-LE.A.1C