5^n-3= 1/25 What is the value of n

Mathematics

1 answer:

drek231 [11]3 years ago

6 0

Happy New Year from MrBillDoesMath!

Answer:

n = log(76/25) / log(5)

Discussion:

5^n -3 = 1/25 => (add 3 to both sides)

5^n = 3 + 1/25 = 73/25 + 1/25 = 76/25 (take log;s of both sides)

log(5^n) = log (76/25) =>

n log(5) = log(76/25) =>

n = log(76/25) / log(5)

Thank you,

MrB

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120 % = 160

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Find 1 % :
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120% = 160
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Find 100% :
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100% = 4/3 x 100
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Answer: 160 is 120% of 133 1/3
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