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Lorico [155]
3 years ago
13

can u tell me what this is plz, I think I have worked it out but don't know if it is right: decrease £60 by 20%

Mathematics
2 answers:
aalyn [17]3 years ago
7 0
48. 20% of 60 euros would be 12 euros. Decreasing it means to subtract, so 60 - 12 = 48
BlackZzzverrR [31]3 years ago
3 0
The answer would be £48 because if you divide 60 by 5, you get 12. 4/5 would be 48, or a twenty percent decrease.
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4 0
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A culture started with 3000 bacteria. After 4 hours, it grew to 3,600 bacteria. Predict how many bacteria will be present after
Vlad [161]
Hello Shannonrodrigue. You can solve this by setting up an exponential growth equation.

A = A_ob^t
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Now we solve for b
3600 = 3000b^4
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\sqrt[4]{\frac{6}{5}} = \sqrt[4]{b^4}
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Now that we have found b, we can use the equation A = 3000b^t to predict how many bacteria will be present after 10 hours.
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4 0
3 years ago
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Pani-rosa [81]
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5 0
2 years ago
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