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Anna11 [10]
3 years ago
5

Some help me please help me please help me please

Mathematics
1 answer:
kodGreya [7K]3 years ago
4 0
1_ 210+90= 300



2_ it's prime:


[1,19]




good luck


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PLZ HELP!!! Use limits to evaluate the integral.
Marrrta [24]

Split up the interval [0, 2] into <em>n</em> equally spaced subintervals:

\left[0,\dfrac2n\right],\left[\dfrac2n,\dfrac4n\right],\left[\dfrac4n,\dfrac6n\right],\ldots,\left[\dfrac{2(n-1)}n,2\right]

Let's use the right endpoints as our sampling points; they are given by the arithmetic sequence,

r_i=\dfrac{2i}n

where 1\le i\le n. Each interval has length \Delta x_i=\frac{2-0}n=\frac2n.

At these sampling points, the function takes on values of

f(r_i)=7{r_i}^3=7\left(\dfrac{2i}n\right)^3=\dfrac{56i^3}{n^3}

We approximate the integral with the Riemann sum:

\displaystyle\sum_{i=1}^nf(r_i)\Delta x_i=\frac{112}n\sum_{i=1}^ni^3

Recall that

\displaystyle\sum_{i=1}^ni^3=\frac{n^2(n+1)^2}4

so that the sum reduces to

\displaystyle\sum_{i=1}^nf(r_i)\Delta x_i=\frac{28n^2(n+1)^2}{n^4}

Take the limit as <em>n</em> approaches infinity, and the Riemann sum converges to the value of the integral:

\displaystyle\int_0^27x^3\,\mathrm dx=\lim_{n\to\infty}\frac{28n^2(n+1)^2}{n^4}=\boxed{28}

Just to check:

\displaystyle\int_0^27x^3\,\mathrm dx=\frac{7x^4}4\bigg|_0^2=\frac{7\cdot2^4}4=28

4 0
2 years ago
Use long division to determine the decimal equivalent of 8 over 9
lyudmila [28]
8/9 is equal to in decimal form <span>0.88888889. You do long division. After all number finished add a decimal and add a 0 and bring that down and keep going until you can't divide anymore.</span>
6 0
3 years ago
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PLEASE ANSWER AND EXPLAIN | 98 POINTS
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<em>Answer:</em>

<em>d</em>

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<em>0.9</em>

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<em>The value of a correlation coefficient ranges between -1 and 1.</em>

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<em>The greater the absolute value of the Pearson product-moment correlation coefficient, the stronger the linearrelationship.</em>

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<em>The strongest linear relationship is indicated by a correlation coefficient of -1 or 1.</em>

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<em>The weakest linear relationship is indicated by a correlation coefficient equal to 0.</em>

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<em>A positive correlation means that if one variable gets bigger, the other variable tends to get bigger.</em>

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3 0
3 years ago
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Andy’s dog weighs 27 pounds, which is 3/4 the weight of Seher’s dog. How many pounds does Seher’s dog weigh?
spayn [35]

Answer:

20.25 lbs

Step-by-step explanation:

Multiply 27 by 3/4 or .75 to equal 20.25.

8 0
2 years ago
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There are 18 tables at a party each table can seat six people complete the equation to show which operation to use and the total
galina1969 [7]

I can't complete the equation or the sentence because they have not been provided. However, I can write you an equation to model this situation.

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Step-by-step explanation:

If each table seats 6 people, there are 18 tables, and we are trying to find the total number of seated persons, it can be modeled as such:

tables x capacity of each table=total number of seated persons

plug in:

18x6=108

8 0
3 years ago
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