If g(x)= 2x^4+3x^3-x^2, find g(-1)

In hypothesis testing of two population means with a 5% significance level, we compare the difference between two sample means against a null hypothesis that states no difference, using t- or z-distributions depending on whether population standard deviations are known.

Hypothesis Testing of Two Population Means

In statistics, when we want to test the claim about the difference between two population means,
(μ1 and μ2), we use a procedure known as a hypothesis test. If we assume that the samples are random, independent, and drawn from normally distributed populations, we usually proceed with a formula involving the sample means, sample standard deviations, and sample sizes.

In a hypothesis test, the null hypothesis (H0) typically states that there is no difference between the two population means (H0: μ1 = μ2). The alternative hypothesis (Ha) suggests that there is a difference (Ha: μ1 ≠ μ2). To assess the validity of H0, we calculate a test statistic that follows a known distribution (typically a t-distribution if standard deviations are unknown and a z-distribution if they are known) under the assumption that H0 is true.

For a test at the 5 percent level of significance (α=0.05), we determine the critical value(s) from the statistical tables of the chosen distribution. If the calculated test statistic falls into the critical region determined by α, we reject the null hypothesis in favor of the alternative hypothesis. If not, we fail to reject the null hypothesis. This process is essentially a two-tailed test, given that we allow for the possibility of the sample mean being either larger or smaller than the hypothesized population mean.

The assumption of normality is critical when the sample sizes are small. For larger samples, according to the Central Limit Theorem, the sampling distribution of the mean will be approximately normal regardless of the underlying distribution of the population.

It is important to note that while we can never prove a hypothesis definitively, hypothesis testing allows us to make probabilistic statements about whether data is consistent with a given hypothesis.

The correct figure which has all sides of equal measure but not necessarily all angles of equal measure are ''Rhombus'' and ''parallelogram''.

A rectangle is a two dimension figure with 4 sides, 4 corners and 4 right angles. The opposite sides of the rectangle are equal and parallel to each other.

Given that;

To find figure which has all sides of equal measure but not necessarily all angles of equal measure.

Now, We know that;

In a Parallelogram, A parallelogram is a quadrilateral with two pairs of parallel sides. The opposite sides of a parallelogram are equal in length.

And, In a Rhombus, A rhombus is a quadrilateral with both pairs of opposite sides parallel and all sides the same length,

Thus, The correct figure which has all sides of equal measure but not necessarily all angles of equal measure are Rhombus and parallelogram.

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Abra made 9/10 of her free throws which are equal to 90%, so Abra is the best shooter.

A percentage is a number or ratio that can be expressed as a fraction of 100. If we have to calculate the percent of a number, divide the number by the whole and multiply by 100.

Hannah made 0.7 of her free throws in a basketball game.

[tex]\rm = 0.7 \times 100\\\\=70 \ percent[/tex]

Hannah made 0.7 of her free throws in a basketball game which is equal to 70%.

Abra made 9/10 of her free throws.

[tex]\rm =\dfrac{9}{10}\times 100\\\\= 9\times 10\\\\=90 \ percent[/tex]

Abra made 9/10 of her free throws which are equal to 90%.

Dena made 3/4 of her free throws.

[tex]\rm =\dfrac{3}{4} \times 100\\\\=3\times 25\\\\=75 \ percent[/tex]

Dena made 3/4 of her free throws which are equal to 75%.

Hence, Abra made 9/10 of her free throws which are equal to 90%, so Abra is the best shooter.

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To find the ratio of corresponding sides for similar triangles, compare the lengths of the corresponding sides in both triangles. If the triangles are similar, these ratios will be equal. To simplify the ratio, divide each term by the greatest common factor.

In mathematics, to write the ratio of corresponding sides for similar triangles, you need to compare the lengths of the sides that have the same relative position. These corresponding sides are proportional in similar triangles. Let's consider a simple scenario where we have two similar triangles

A'B'C' and ABC.

If these two triangles are similar, the ratio of their corresponding sides will be equal. Hence our ratios will look like this:

a'/a = b'/b = c'/c.

This is the ratio of corresponding sides for the similar triangles. To reduce the ratio to the lowest term, you simply divide each term by the greatest common factor of all the terms.

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To find the ratio of corresponding sides of similar triangles, identify the corresponding sides and write a ratio comparing the lengths of these sides. For example, if side AB in triangle ABC corresponds to side DE in triangle DEF with lengths 3 and 6 respectively, the ratio is 3/6 or 1/2 when reduced.

To write the ratio of corresponding sides for similar triangles, we must first identify which sides correspond in the two triangles. Usually, triangles are labeled so that corresponding sides have the same label (like "a", "b", etc.). Once you've identified which sides correspond, simply write a ratio comparing the length of one side in the first triangle to the length of the corresponding side in the second triangle. This could look something like a1/a2.

For example, if triangle ABC is similar to triangle DEF and side AB corresponds to DE with lengths 3 and 6, respectively, then the ratio of the corresponding sides is 3/6 or 1/2 in reduced form.

Understanding the ratio of corresponding sides is key to understanding the properties of similar triangles and can be extremely helpful in solving problems involving these figures not just in geometry, but in other branches of mathematics as well.

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The answer to this question is A: 31

Answer:

8/13 - 1/13i

Step-by-step explanation:

Final answer:

To convert the expression (1-2i)/(2-3i) to standard form, multiply by the complex conjugate of the denominator (2+3i). After simplification, the standard form of the complex number is 0.8 - 0.1i.

Explanation:

To write the expression (1-2i)/(2-3i) as a complex number in standard form, we need to eliminate the imaginary unit i from the denominator. This can be achieved by multiplying both the numerator and the denominator by the complex conjugate of the denominator. The complex conjugate of a complex number 2-3i is 2+3i.

Multiplying the expression by the complex conjugate, we get:

(1-2i)(2+3i) / (2-3i)(2+3i).

Now, we can expand both the numerator and denominator:

Numerator: (1 × 2) + (1 × 3i) - (2i × 2) - (2i × 3i) = 2 + 3i - 4i - 6(i²)

Denominator: (2 × 2) + (2 × 3i) - (3i × 2) - (3i × 3i) = 4 - 6(i²)

Recall that i² = -1, so we can simplify the expression further.

Numerator: 2 + 3i - 4i + 6 = 8 - i

Denominator: 4 + 6 = 10

Therefore, our complex number in the standard form is:

(8 - i) / 10 = 0.8 - 0.1i.

Answer:

You would shift this to the right 8 places

Step-by-step explanation:

Acetic acid, with the molecular formula C2H4O2, has a carbon to hydrogen atom ratio of 2:4, which simplifies to a 1:2 ratio.

The student's question pertains to the ratio of carbon atoms to hydrogen atoms in an acetic acid molecule. Acetic acid, which is also known as vinegar, has the molecular formula C2H4O2. The ratio of carbon to hydrogen atoms can be found by considering the number of carbon atoms and the number of hydrogen atoms in the formula. There are 2 carbon atoms and 4 hydrogen atoms, resulting in a 2:4 ratio. However, this ratio can be simplified by dividing both numbers by the greatest common divisor, which is 2. After simplifying, the ratio of carbon to hydrogen atoms becomes 1:2.

The number of distinct license plates can be formed if there are no restrictions on the digits or letters is 175,760,000.

Given that, in Virginia, each automobile license plate consists of a single digit followed by three letters, followed by three digits.

Permutations are different ways of arranging objects in a definite order. It can also be expressed as the rearrangement of items in a linear order of an already ordered set.

There are 26 letters A to Z in the alphabet. There are 10 digits 0 to 9

Assuming repetition allowed.

Now, 10×26×26×26×10×10×10

= 175,760,000

Hence, the number of distinct license plates can be formed if there are no restrictions on the digits or letters is 175,760,000.

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Answer:

Option B is correct

-2.3

Step-by-step explanation:

Average rate of change(A(x)) for the function f(x) over the interval [a, b] is given by:

[tex]A(x) = \frac{f(b)-f(a)}{b-a}[/tex]           ....[1]

We have to find the  average rate of change from x = 1 to x = 4.

From the graph as shown below

For x = 1

f(1) = 3

and

For x = 4

f(4) = -3.9

Using [1] we have;

[tex]A(x) = \frac{f(4)-f(1)}{4-1}[/tex]

Substitute the given values we have;

[tex]A(x) = \frac{-3.9-3}{3}[/tex]

⇒[tex]A(x) = \frac{-6.9}{3}[/tex]

Simplify:

[tex]A(x) = -2.3[/tex]

Therefore, -2.3  value is closest to the average rate of change from x = 1 to x = 4

Answer:

$154,960,863.44

Step-by-step explanation:

Add the 5 earnings numbers using a suitable calculator.

_____

In this case, a "suitable calculator" is one that will display numbers of 11 digits or more. Apparently the one at the Google search box is up to the task.

The total earnings of all five movies in the given week were approximately $155,950,863.44.

To find the total earnings of all five movies in the given week, you can simply add up their individual earnings:

Total Earnings = Earnings of Movie A + Earnings of Movie B + Earnings of Movie C + Earnings of Movie D + Earnings of Movie E

Total Earnings = $26,088,808.74 + $60,394,938.12 + $23,659,617.52 + $34,311,887.98 + $10,505,611.08

Now, calculate the sum:

Total Earnings = $155,950,863.44

So, the total earnings of all five movies in the given week were approximately $155,950,863.44.

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The probability of getting heads then a number less than 4 is, 0.15

"Probability is a branch of mathematics which deals with finding out the likelihood of the occurrence of an event."

The formula of the probability of an event A is:

[tex]P(A)=\frac{n(A)}{n(S)}[/tex] , where [tex]n(A)[/tex] is the number of favorable outcomes and [tex]n(S)[/tex] is the total number of events in the sample space.

For given situation,

Let, event A: getting heads on a coin toss

and event B: choosing a number less than four from 1-10

For event A, [tex]n(A)=1[/tex] and [tex]n(S)=2[/tex] (either head or tail)

So, [tex]P(A)=\frac{1}{2}[/tex]

Similarly, for event B:

choosing a number less than four = {1, 2, 3}

So, [tex]n(B)=3[/tex] and [tex]n(S)=10[/tex]

⇒ [tex]P(B)=\frac{3}{10}[/tex]

The probability of getting heads and choosing a number less than 4 is:

⇒ [tex]\frac{1}{2}[/tex] × [tex]\frac{3}{10}[/tex]

[tex]=\frac{3}{20}[/tex]

[tex]=0.15[/tex]

Hence, the probability of getting heads then a number less than 4 is 0.15

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