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2 years ago

Help me plz I need to finish these test corrections toooddayyyy

Mathematics

1 answer:

Dafna1 [17]2 years ago

3 0

Answer:

I thank it is B.

Step-by-step explanation:

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Find the GCD of 48,120

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24 is the GCD of 48,120

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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

Initial population = 570000

Rate at which population decreases is given by

$\frac{2}{3}$

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.

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2 years ago

You invest 2,000,00 in stock plan and another in a saving account the stock plan decreases by 7% the first year and gains 10% th

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After calculating the stock and savings account total I found out that the difference in earning between them is $104.738.

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2 years ago

I need help with this because this is hard

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The answer it’s (A) -10

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