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3 years ago

When the fraction below is written as a decimal, how many digits are in the smallest

Mathematics

1 answer:

tiny-mole [99]3 years ago

6 0

Answer: I THINK it's A

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What is the factored form of the expression?<br><br> 16b^2 – 81

solong [7]

Answer:

(4b-9) (4b+9)

Step-by-step explanation:

16b^2 – 81

This is the difference of squares

(a^2 -c^2) = (a-c) (a+c)

a^2 = 16b^2 so a= 4b

c^2 = 81 so c = 9

(16b^2 – 81) = (4b-9) (4b+9)

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4 years ago

Using the following preference list, which candidate is the winner using Plurality Voting?

jonny [76]

Answer:

Step-by-step explanation:

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3 years ago

The city's budget is 8,000,000. The city actually spends 12,000,000.What is the city's deficit

Anna35 [415]

Hi!

We will subtract the budget with the sum that was actually spent, like this:

8,000,000 - 12,000,000 = -4,000,000

The city's deficit is -4,000,000

Hope this helps!

6 0

3 years ago

A physicist examines 28 sedimentary samples for mercury concentration. The mean mercury concentration for the sample data is 0.8

fiasKO [112]

Answer: $0.861$

Step-by-step explanation:

The confidence interval for population mean $(\mu)$ is given by :-

$\overline{x}\pm t_c\dfrac{s}{\sqrt{n}}$ , where n=sample size

$\overline{x}$ = sample mean

$s$ =sample standard deviation

$t_c$ = critical t-value (for two tailed )

Let $\mu$ be the confidence interval for the population mean mercury concentration.

As per given , we have

Sample size : n= 28

degree of freedom = 27 [df=n-1]

Sample mean : $\overline{x}=0.863$ cc/cubic meter

Sample standard deviation : s= 0.0036

Significance level : $\alpha=1-0.98=0.02$

Critical two-tailed test value :

$t_c=t_{\alpha/2,df}=t_{0.01,\ 27}= 2.473$ (Using t-distribution table.)

We assume the population is approximately normal.

Now, the 98% confidence interval for the population mean mercury concentration will be :-

$0.863\pm (2.473)\dfrac{0.0036}{\sqrt{28}}\\\\=0.863\pm(0.002)\\\\=(0.863-0.002,\ 0.863+0.002)=(0.861,\ 0.865)$

Required confidence interval : $0.861$

4 0

3 years ago

If it took me 3 months to gain 1200 euro how many months does it take for me to gain 1000 euro

Afina-wow [57]

3 more months but you'll have an extra 200.

3 0

3 years ago

Read 2 more answers