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3 years ago

Plz help me plzzzzzzzzzzzzzzzzzz

Mathematics

2 answers:

12345 [234]3 years ago

8 0

Answer:

Step-by-step explanation:

AnnZ [28]3 years ago

4 0

Answer

The answer is 1/64

Step-by-step explanation:

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A random sample of 70 printers discovered that 25 of them were being used in small businesses. find the 95% limit for the popula

kvasek [131]

Answer:

The sample proportion of printers used in small business is:

$\hat{p}=\frac{25}{70}=0.3571$

The 95% confidence interval for the population proportion of printers that are used in small businesses is:

$\hat{p} \pm z_{\frac{0.05}{2}} \sqrt{\frac{\hat{p}(1-\hat{p})}{n} }$

Where:

$z_{\frac{0.05}{2}}=1.96$ is the critical value at 0.05 significance level

$\therefore 0.3571 \pm 1.96 \sqrt{\frac{0.3571(1-0.3571)}{70} }$

$0.3571 \pm 0.1122$

$\left ( 0.3571 - 0.1122, 0.3571 + 0.1122 \right)$

$\left(0.245,0.469 \right)$

Therefore, the 95% confidence interval for the population proportion of printers that are used in small businesses is (0.245 , 0.469)

7 0

3 years ago

Please help me with this question

san4es73 [151]

Step-by-step explanation:

Given: $f'(x) = x^2e^{2x^3}$ and $f(0) = 0$

We can solve for f(x) by writing

$\displaystyle f(x) = \int f'(x)dx=\int x^2e^{2x^3}dx$

Let $u = 2x^3$

$\:\:\:\:du=6x^2dx$

Then

$\displaystyle f(x) = \int x^2e^{2x^3}dx = \dfrac{1}{6}\int e^u du$

$\displaystyle \:\:\:\:\:\:\:=\frac{1}{6}e^{2x^3} + k$

We know that f(0) = 0 so we can find the value for k:

$f(0) = \frac{1}{6}(1) + k \Rightarrow k = -\frac{1}{6}$

Therefore,

$\displaystyle f(x) = \frac{1}{6} \left(e^{2x^3} - 1 \right)$

5 0

3 years ago

The answer and how did you got it

VMariaS [17]

Answer:

Help me What did you in msnjxnjxnjcdjjhejxjjxjx

7 0

3 years ago

How do I factor 14x^2-7xy-147y^2

Viefleur [7K]

STEP 1

Equation at the end of step

((14 • (x2)) - 7xy) - (3•72y2)

Equation at the end of step 2

((2•7x2) - 7xy) - (3•72y2)

STEP 3

STEP 4

Pulling out like terms

4.1 Pull out like factors :

14x2 - 7xy - 147y2 = 7 • (2x2 - xy - 21y2)

Trying to factor a multi variable polynomial :

4.2 Factoring 2x2 - xy - 21y2

Try to factor this multi-variable trinomial using trial and error

Found a factorization : (2x - 7y)•(x + 3y)

6 0

3 years ago

The nth term of a number sequence is 2n+5. Write down the first three terms of the sequence.

Lynna [10]

Hello,

u(n)=2n+5
u(1)=2*1+5=7
u(2)=2*2+5=9
u(3)=2*3+5=11
...

6 0

3 years ago