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IrinaVladis [17]
3 years ago
8

What 2 numbers multiply to -216 and add up to 6

Mathematics
2 answers:
Lena [83]3 years ago
7 0
-12 and 18

hope this helps :)
disa [49]3 years ago
4 0
-12 and 18 add up to six and multiply to -216
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Scientists have discovered a vaccine for a debilitating disease. This year there were 570,000 reported new cases of the disease
Ket [755]

Answer: There are approximately 853827 new cases in 6 years.

Step-by-step explanation:

Since we have given that

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Rate at which population decreases is given by

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Now,

First year =570000

Second year is given by

570000\times (\frac{1}{3})

Third year is given by

570000(\frac{1}{3})^2

so, there is common ratio ,

it becomes geometric progression, as there is exponential decline.

so,

570000,570000\times \frac{1}{3},570000\times( \frac{1}{3})^2,......,570000\times (\frac{1}{3})^6

a=570000

common ratio is given by

r=\frac{a_2}{a_1}=\frac{1}{3}

number of terms = 6

Sum of terms will be given by

S_n=\frac{a(1-r^n)}{(1-r)}

We'll put this value in this formula,

S_6=\frac{570000(1-(\frac{1}{3})^6}{(1-\frac{1}{3})}\\\\=853827.16

So, there are approximately 853827 new cases in 6 years.

6 0
3 years ago
Simplify this please
aliina [53]

Answer:

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Step-by-step explanation:

7 0
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Step-by-step explanation:

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