PLZ HELP, 3 * 2/15 exsplain how you got it too. i just need an exsplaination. step by step.

Answer:

Experiment results, and more results!

They help a LOT!

Step-by-step explanation:

Answer:

the third one

Step-by-step explanation:

all you have to do is multiply the exponents

Answer:

Step-by-step explanation:

A rational number is one that can be expressed as a fraction. Pi cannot be. If I tell you that the 2000th digit of pi is an 8 (which it probably isn't) and I ask you to tell me the 2001 value of pi, you have no better odds that 1/10 of getting it right.

A rational number can always be reduced to a fraction. 20 1/2 can be expressed as a fraction. It is 20.5

Pi is irrational. I don't know the value of pi beyond what a calculator can tell me.  3.14159265 The next digit is a 4. I know this only because that is what the calculator tells me.

Repeating decimals call always be represented as a fraction. For ex

x = 0.123123123123123

1000x = 123.123123123123

       x =       .123123123123123      Subtract

999x = 123

This comes about because in both cases what is after the decimal is the same.

x = 123/999 = 41/333

The number of threads Marvin have left is 13 yards of thread

If  each spool thread is 10.5 yards 2 spools of thread will contain how many yards

= 10.5 * 2

= 21 yards

Marvin used 4 yards from each, hence Marvin used a total of 2 * 4 = 8 yards from the 2 spools of thread

The number of yards remaining is found by subtraction

= 21 - 8

= 13 yards

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Answer:

30.6 percent

Step-by-step explanation:

Answer:

50

Step-by-step explanation:

20 + 3n = ?

Substitute the variable for what it equals (n = 10)

20 + 3(10) = ?

Use PEMDAS to answer.

20 + 30 = ?

50 = ?

The answer is 50.

Answer:

h(2)= 8+3=11

g(-7)= 28+2=30

Step-by-step explanation:

a. Var[X] = E[X^2] = 1/10.

b. Expected cost E[70X^4] is 3.

We need to first find E[X^2]. Since E[X] = 0, the variance Var[X] = E[X^2].

∫ x^2 * f(x) dx,
We assume the domain of the PDF to be [-1, 1], as f(x) = 0.75(1-x^2) is only positive in that range.
E[X^2] = ∫(-1 to 1) x^2 * 0.75(1-x^2) dx
E[X^2] = 0.75 ∫(-1 to 1) x^2 - x^4 dx
E[X^2] = 0.75 * (1/3 - 1/5) = 0.75 * (2/15) = 1/10
Thus, Var[X] = E[X^2] = 1/10.

To calculate ∫ 70x^4 * f(x) dx over the domain [-1, 1].
E[70X^4] = ∫(-1 to 1) 70x^4 * 0.75(1-x^2) dx
Now, compute the integral:
E[70X^4] = 52.5 ∫(-1 to 1) x^4 - x^6 dx
E[70X^4] = 52.5 * (1/5 - 1/7) = 52.5 * (2/35) = 3
Thus, the expected cost E[70X^4] is 3.

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The area under the graph of the function f(x) = e^x over the interval [-2, 2] is approximately 13.77 square units.

To calculate the area under the graph of the function, we can use integration. In this case, we need to integrate the function f(x) = e^x with respect to x over the interval [-2, 2].

The definite integral represents the area under the curve between the given limits.

∫[a,b] e^x dx

Applying the integral, we have: ∫[-2,2] e^x dx

Using the rules of integration, we can evaluate this integral to find the area under the curve.

The antiderivative of e^x is e^x itself. Evaluating the integral at the upper and lower limits, we get: [e^x] from -2 to 2

Plugging in the values, we have: e^2 - e^(-2)

This is the exact answer in terms of e. To get the numerical approximation, you can substitute the value of e into the expression to get the approximate area.

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The probability of a red light be on this road so that neither road would be preferred over the other on the basis of expected number of red lights is 0.3375.

What is Probability:

Probability means possibility. It is a branch of mathematics that deals with the occurrence of a random event. The value is expressed from zero to one. Probability has been introduced in Math's to predict how likely events are to happen. The meaning of probability is basically the extent to which something is likely to happen. This is the basic probability theory, which is also used in the probability distribution, where you will learn the possibility of outcomes for a random experiment. To find the probability of a single event to occur, first, we should know the total number of possible outcomes.

Now,

PDF of a Binomial (n, x) distribution is

given as

p(X=x).\(C^n_x P^x (1-p)^(n-x)\)    x =  0,1,2,

Here n = 9, 2:4, p = 0.3

P(x-4)= 9^c_4(0.3)^4 (0.75)^5 = 0·1715 Ans

R Code

We will use the function pGnom() which gives the Cumulative probability of an

Probability  of getting exactly 4 heads is

x <- pGnom (4,9, 0.3) - pGnom (3,9, 0.3)

(We substract 3 to get P(X = 4) since above we have P(X<4) - P(X ≤3)

b)

Expected number in a binomial distribution = np

We  have to equate the Expected values

So

9x0.3 = 8xp

os, p = 0.3375.

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Answer:

This is your answer ☺️☺️

The quadratic function for this problem is given as follows:

G. y = -0.4(x + 5)(x - 2).

The roots of the quadratic function are given as follows:

Hence the linear factors of the function are given as follows:

Considering the factor theorem, the function is given by the product of it's linear factors and the leading coefficient a, hence:

f(x) = a(x + 5)(x - 2)

When x = 0, y = 4, hence the leading coefficient a is given as follows:

-10a = 4

a = -4/10

a = -0.4.

Hence the function is:

y = -0.4(x + 5)(x - 2).

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Answer:

https://brainly.com/question/6423861

Step-by-step explanation:

Use link and give me 5 stars and brainliest

Answer:

it should be B

mark me as the brainliest please

The smallest integer value in the set is 7.

The grouping of positive and negative numbers is known as integers. Integers, like whole numbers, do not include the fractional portion. Integers can therefore be defined as numbers that can be positive, negative, or zero but not as fractions.

Since an integer is a whole number, it can reach both positive and negative infinity. 0 is the smallest non-negative number.

Consider the given term as -3(x-4) = 12

Then, -3x + 12 = 12

or, -3x = 0

or, x = 0

So, the value of x is either x > 0 or x < 0

Based on the given option, the smallest integer value is 7.

So, the required answer is 7.

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The following equation can be used to calculate the width, w, of the rectangle with the specified area: 2w²- w - 91 = 0.

rectangle area = length width

Multiply the length by the width to obtain the area of a rectangle. The formula is as follows: A = L * W where A is the area, L denotes the length, W denotes the width, and * denotes multiplication. where A denotes area, s denotes side length, and implies multiply.

Given,

Rectangle area = 91 in.

2 w = width

The rectangle's length equals 2w - 1.

Using the area formula, the equation for calculating w would be: (2w - 1)(w) = 91.

2w² - w - 91 = 0

As a result, the equation for determining the width, w, of the rectangle with the specified area is: 2w² - w - 91 = 0.

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The expression that represents how much more Elena spent is $3.2 + p

An expression is any mathematical statement which consists of numbers, variables and an arithmetic operation between them. In mathematics, an expression or mathematical expression is a finite combination of symbols that is well-formed according to rules that depend on the context.

here, we have,

The variable p represents the price, in dollars, per pound of cherries.

Elena buys a watermelon for $ 6.35 and 5 pounds of cherries.

So, the price of the cherries bought by Elena will be = 5*p

Then the total amount spent by Elena during her purchase of fresh fruits is:

$6.35 + 5*p

On the other hand, Tania buys a pineapple for $ 3.15 and 4 pounds of cherries. So, the price of the cherries bought by Tania will be 4*p

Therefore, the total amount spent by Tania during her purchase of fresh fruits is:

$3.15 + 4*p

You want to determine an expression to represent how much more Elena spent. That is, you want to determine the difference between the money spent by Elena and the money spent by Tania, which represents how much more Elena spent:

Total amount spent by Elena on fresh fruits - Total amount spent by Tania on fresh fruits

$6.35 + 5*p - ($3.15 + 4*p)

Solving:

$6.35 + 5*p - $3.15 - 4*p

($6.35 - $3.15) + (5*p - 4*p)

$3.2 + p

The expression that represents how much more Elena spent is $3.2 + p

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Answer:

3. 8 feet

Step-by-step explanation:

To find the horizontal distance (x) in feet, we can use the following steps:

Step 1: Determine the vertical height that the box has been lifted.

The difference between the two points is:

9 ft - 3 ft = 6 ft.

Therefore, the box has been lifted 6 feet.

Step 2: Use the slope of the ramp to find the horizontal distance (x).

The slope of the ramp is given as 3/4. This means that for every 3 feet the ramp rises vertically, it moves 4 feet horizontally. We can set up a proportion to solve for x:

3/4 = 6/x

We can cross-multiply to get:

3x = 24

Dividing both sides by 3 gives us:

x = 8

Therefore, the horizontal distance (x) is 8 feet.

its 6

Step-by-step explanation:

Answer: its 6.

Have a great day/night!

Answer:

Step-by-step explanation:

X=44

The sine function that will model the situation is:

h(t) = 1 * sin(2π/28 * t) + 10, where h(t) represents the water level in feet and t represents the number of days.

To model the water level in the pond using a sine function, we need to consider the period, amplitude, and vertical shift.

Given that the cycle repeats every 28 days, the period of the sine function is 28 days. This means that the function will complete one full cycle every 28 days.

The water level varies between the average level of 10 feet and a maximum level of 12 feet. The difference between these two levels is 2 feet, which represents the amplitude of the sine function.

The sine function is symmetric around the average level, so the vertical shift or the mean value of the function is 10 feet.

Putting all the pieces together, we can write the sine function that models the situation as:

h(t) = 1 * sin(2π/28 * t) + 10

The sine function h(t) = 1 * sin(2π/28 * t) + 10 accurately models the water level in the pond, where h(t) represents the water level in feet and t represents the number of days. This function has a period of 28 days, an amplitude of 2 feet, and a vertical shift of 10 feet. It captures the cyclical nature of the water level, oscillating between the maximum, minimum, and average levels over the course of the 28-day cycle.

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Answer:

The median of 12, 9, 13, 15, 12, 16, 19, 13, 12, 12, 16, 12, 14, 6  is...

12.5 (B)

The median number of credit hours for this sample 12, 9, 13, 15, 12, 16, 19, 13, 12, 12, 16, 12, 14, 6  is 12.5 (B)

The mean is the average value which can be calculated by dividing the sum of observations by the number of observations

Mean = Sum of observations/the number of observations

Median represents the middle value of the given data when arranged in a particular order.

It is given that A simple random sample of 14 students on a large university campus is asked to complete a survey. One of the questions on the survey asks for the number of credit hours for which they are currently enrolled.

The results of the survey are shown below;

12, 9, 13, 15, 12, 16, 19, 13, 12, 12, 16, 12, 14, 6

The median number of credit hours for this sample 12, 9, 13, 15, 12, 16, 19, 13, 12, 12, 16, 12, 14, 6  is 12.5 (B)

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The value of the exponent (2/5)^3 is \(\frac{8}{125}\)

In the above question, it is given that

(2/5)^3

The number of times a number has been multiplied by itself is referred to as an exponent. For instance, the expression 2 to the third (written as 2^3) signifies 2 x 2 x 2 = 8.

We need to solve it and then find the value of the exponent

(2/5)^3

= \(\frac{2}{5}\) x \(\frac{2}{5}\) x \(\frac{2}{5}\)

= \(\frac{2 . 2. 2}{5 . 5 . 5}\)

= \(\frac{8}{125}\)

Therefore the value of the exponent (2/5)^3 is \(\frac{8}{125}\)

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(a) The average speed for the trip is approximately 55.3472 km/h.

(b) The distance between the initial and final cities along the route is approximately 90.3333 km.

To find the average speed for the trip, we need to calculate the total distance traveled and the total time taken.

Time spent driving at 100.0 km/h (t1) = 20.0 min

Time spent driving at 65.0 km/h (t2) = 18.0 min

Time spent driving at 50.0 km/h (t3) = 45.0 min

Time spent for lunch and buying gas (t4) = 15.0 min

(a) Calculating the average speed:

We'll convert all time values to hours and distance values to kilometers for consistency.

Total time taken (T) = t1 + t2 + t3 + t4 = (20.0/60) + (18.0/60) + (45.0/60) + (15.0/60) hours

T = 0.3333 + 0.3 + 0.75 + 0.25 hours

T = 1.6333 hours (rounded to four decimal places)

Distance traveled at 100.0 km/h (d1) = 100.0 km/h * (20.0/60) hours = 33.3333 km

Distance traveled at 65.0 km/h (d2) = 65.0 km/h * (18.0/60) hours = 19.5 km

Distance traveled at 50.0 km/h (d3) = 50.0 km/h * (45.0/60) hours = 37.5 km

Total distance traveled (D) = d1 + d2 + d3 = 33.3333 km + 19.5 km + 37.5 km = 90.3333 km (rounded to four decimal places)

Average speed (v_avg) = Total distance / Total time = 90.3333 km / 1.6333 hours ≈ 55.3472 km/h

Therefore, the average speed for the trip is approximately 55.3472 km/h.

(b) To determine the distance between the initial and final cities along the route, we simply need the total distance traveled, which we have already calculated:

Distance between initial and final cities = Total distance traveled = 90.3333 km

Therefore, the distance between the initial and final cities along the route is approximately 90.3333 km.

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a. When evaluating a model, we use R2 as a parameter for performance assessment.

b. If model A has a higher MAPE but model B has a higher R2, we choose the model with the higher R2 for better overall performance.

c. For accuracy measures, we typically use MAPE (Mean Absolute Percentage Error) due to its interpretability and ability to capture relative errors.

When evaluating a model's performance, it is crucial to choose the appropriate parameters to assess its accuracy and reliability. In the case of MAPE (Mean Absolute Percentage Error) and R2 (Coefficient of Determination), the choice between them depends on the specific evaluation goals.

The R2 parameter is commonly used for evaluating models because it measures the proportion of the dependent variable's variance that can be explained by the independent variables. R2 provides insights into how well the model fits the data and captures the relationship between the input features and the target variable. Therefore, R2 is a suitable parameter to use when evaluating a model.

When comparing two models, if model A has a higher MAPE but model B has a higher R2, it is advisable to choose the model with the higher R2 value. This is because R2 indicates the proportion of variance explained, suggesting that model B performs better in capturing the underlying patterns and predicting the target variable.

Although model A may have a lower relative error (MAPE), it is crucial to prioritize the model's ability to explain and predict the target variable accurately.

Among MAPE, MAD (Mean Absolute Deviation), and MSD (Mean Squared Deviation), MAPE is commonly preferred as a parameter for accuracy measures. MAPE calculates the average percentage difference between the predicted and actual values, making it interpretable and easily understandable.

It captures relative errors and enables comparisons across different scales and datasets. MAD and MSD, on the other hand, measure absolute and squared errors, respectively, but they do not account for the relative magnitude of the errors. Hence, MAPE is a more suitable parameter for accuracy measures.

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Answer:

88

Step-by-step explanation:

Find the relationship between the numbers;

22÷5=4.4

Therefore,

20×4.4=88

Just a bored teen willing to help,

hope you're having a splendiferous day...

Answer:

go to khan academy and u can find a vid. answer there!

Step-by-step explanation:

Answer:

Force acting on the object varies directly with the objects acceleration:

F∝a

F=ka (Let's call this equation 1)

When F=12 and a =3

Substituting this info into the equation 1;

12=k×3

12=3k

k=4

Substituting k into equation 1

F=4xa

F=4a (Let's call this equation 2)

When F=16

Substituting F=16 into equation 2

16=4a

a=4 m/s^2

Therefore, if the force is changed to 16 N, the acceleration will be 4m/s^2.