Please can someone help me

The Round-off of 15 nearest to the 10th is 20. This process is called rounding off the numbers.

The process is used to simplify the numbers so that the number can easily be calculated, this is called round-off. The Round-off process can take place to the nearest 10, 100,1000, and so on.

In round-off, the numbers 0,1,2,3,4 are considered as nearest to the "0" and the numbers 5,6,7,8,9,10 are considered as nearest to the "10". Just like that, 15 is considered as nearest to the "20".

It can also be used for numbers as well as decimal numbers so that we can write the decimal number in simplified form.

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Answer:

21.21

Step-by-step explanation:

Area of a circle is A = π r^2

Variables:

r = 18/2 = 9

θ = 30 deg

Find the area:

A = π r^2

A = π 9^2

A = 254.47

Find the area of the sector:

θ/360 * A

= 30/360 * 254.47

= 21.21

To find the area of part of the surface of the paraboloid z = 1 – x2 – y2 that lies above the plane z = – 1, we need to first find the intersection curve between the two surfaces.

This occurs when 1 – x2 – y2 = – 1, or x2 + y2 = 2. This is a circle centered at the origin with radius √2. To find the area of the surface above the plane, we need to integrate the surface area element dS over this circle. We can parameterize the surface as r(x,y) = (x, y, 1 – x2 – y2), and the surface area element is given by dS = √(1 + fx2 + fy2)dxdy. Integrating over the circle, we get the area as A = ∫∫√(1 + 4x2 + 4y2)dxdy, which can be evaluated using polar coordinates.

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Answer:

Irrational

Step-by-step explanation:

The square root of 16.45 would be a number that will never end, making it irrational.

Answer:

irrational

Step-by-step explanation:

4.05585995813

does not terminate or repeat

not an integer

Answer:

Total fare is $17, total distance is 5 km.

Step-by-step explanation:

7 + 2x = 12 + x

x = 5

12 + 5 = 17

Answer: 15 - 6i

Step-by-step explanation:

3(5-2i)

3×5+3×(−2i)

Do the multiplications.

15−6i

Answer:

The mean of the given set of numbers is 3.5

Step-by-step explanation:

We need to find the mean of following numbers:

8.9, 6.1, -4.8, 8.2, 2.7,-0.1

For calculating the mean the formula used is: \(Mean=\frac{Sum \ of \ all \ numbers}{Total \ numbers}\)

Finding sum of numbers:

\(Sum \ of \ numbers= 8.9+6.1-4.8+8.2+2.7-0.1\\Sum \ of \ numbers= 21\)

Total numbers = 6

So, mean is:

\(Mean=\frac{Sum \ of \ all \ numbers}{Total \ numbers}\\Mean=\frac{21}{6}\\Mean= 3.5\)

So, mean of the given set of numbers is 3.5

Answer:

52%

Step-by-step explanation:

Answer:

52

Step-by-step explanation:

This is a 10 x 10 grid so you have 100 squares and 52 shaded blue so divide 52/100 for the percent, so 52% are shaded

Answer:  there is 2 small cups for icecream and 75 mediam ice cream bowls

Step-by-step explanation:

2 x 75 = 150

the value of F(9) is approximately 23.308.

To find the value of F(9) given that F(x) is an antiderivative of (ln x)^3/x and F(1) = 0, we can use the fundamental theorem of calculus.

According to the fundamental theorem of calculus, if F(x) is an antiderivative of a function f(x), then:

∫[a,b] f(x) dx = F(b) - F(a)

Since F(1) = 0, we can write:

∫[1,9] (ln x)^3/x dx = F(9) - F(1)

To evaluate the integral, we can make a substitution:

Let u = ln x, then du = (1/x) dx

The integral becomes:

∫[ln 1, ln 9] u^3 du

Integrating u^3 with respect to u:

[(1/4)u^4] | [ln 1, ln 9] = (1/4)(ln 9)^4 - (1/4)(ln 1)^4

Since ln 1 = 0, we have:

(1/4)(ln 9)^4 - (1/4)(ln 1)^4 = (1/4)(ln 9)^4

Therefore, F(9) - F(1) = (1/4)(ln 9)^4

Since F(1) = 0, we can conclude that F(9) = (1/4)(ln 9)^4.

Calculating this value:

F(9) = (1/4)(ln 9)^4 ≈ 23.308

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The flipping of a coin to decide heads or tails, lottery numbers selected by numbered balls, a roulette wheel in a casino, and a hand dealt in a poker game is an example of random device method.

A random device is a device that generates random numbers or other random phenomena such as rolling a die, shuffling a deck of cards, or selecting lottery numbers. In experiments or studies that use probability sampling techniques, researchers typically use a random device to select participants.

This ensures that every member of the population has an equal chance of being selected for the sample.When designing surveys, researchers must consider the type of random sampling technique that they will use. A random sampling method is a way of selecting a sample that ensures that every member of the population has an equal chance of being selected.

When random sampling is used, the sample is more likely to be representative of the population as a whole.

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Nonverbal instruments have been developed primarily in an attempt to d. assess issues that individuals cannot verbalize.

The answer is d. Nonverbal instruments have been developed primarily to assess issues that individuals cannot verbalize. These instruments are often used in psychology and educational assessments to measure skills and abilities in areas such as mathematics, language, and pre-reading skills, while controlling for the influences of language and culture. Nonverbal instruments can be particularly useful for individuals who struggle with verbal communication or have language barriers.

The exchange of information between people without the use of spoken or written language is referred to as nonverbal communication. Facial expressions, eye contact, gestures, posture, body movements, tone of voice, and even the use of time and space are all included in this broad category of behaviors.

A lot of information about a person's emotional state, intentions, attitudes, and personality traits can be communicated nonverbally. A person's posture and body language, for instance, might show whether they are feeling confident or uneasy, and their tone of voice and facial expressions can show whether they are happy, angry, or sad.

A crucial component of human contact is nonverbal communication since it can improve our ability to understand others, establish rapport, and communicate.

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Answer:

(-39/148, -33/37)

Step-by-step explanation:

Let's choose the second equation, 12x + 3 = y, for our substitution.  Substitute (12x + 3) for y in the first equation, obtaining:

8x - 13y = 0  =>  8x - 13(12x + 3) = 0

Next, multiply out -13(12x + 3):  From the above equation we get

                          8x - 156x - 39 = 0

and this simplifies to -148x = 39  or  x = -39/148.

Substitute -39/148 for x in 8x - 13y = 0.  We get:

                              8(-39/148) + 3 = y, so that y = -33/37.

The solution of this system of linear equations is (-39/148, -33/37).

Answer: y=-x+8

Step-by-step explanation:

Answer: C. Hollows where water collects :)

Step-by-step explanation:

Answer:

4 laps

Step-by-step explanation:

Solved using a proportion.

\(\frac{1}{9} = \frac{y}{36}\)

9 × y = 1 × 36

9y = 36

9y ÷ 9 = 36 ÷ 9

y = 4

Answer:

2/5+1/3=6/15+5/15=11/15

30.000+24.000+15.000 =69.000

Answer:

1/2

Step-by-step explanation:

- find the least common denominatir for the two. (12)

-multiply 4 and 3

-multiply 6 and 2

- Add 1 and 5

-Keep the denominator.

-simplify if needed

Answer:

Step-by-step explanation:

answer 1 1/12 hours

Step-by-step explanation:

The given expression is :

2d+11-5d-4

It can be written as :

2d+11-5d-4 = 2d+11+(-5d)+(-4)

Taking like terms together,

= 2d+(-5d)+11+(-4)

Taking d common from above expression :

= d(2+(-5))+11+(-4)

= d(-3)+7

We know that, a(x) = ax

= -3d+7

Hence, these are the required steps.

Answer:

1) 3 more people

2) 9 teams

Step-by-step explanation:

The divisibility rule for 5 is that it must end in 5 and 0

so the next one is 45, so 3 more people

----------------------- ----------------------- ----------------------- -----------------------

45/5=9 teams

Step-by-step explanation:

Let the cost of a notebook be x. Then, the cost of a pen is 2x - 10. Therefore, the linear equation in two variables to represent this statement is: cost of pen = 2(cost of notebook) - 10, or y = 2x - 10.

Given the length of equators for 4 planets

What are possible estimates for the lengths of the equators of Jupiter and Earth?

As shown:

The length of the equator of the earth = 40,030 km

The length of the equator of Jupiter = 439,264 km

We will divide the length of the equator of Jupiter by Earth:

By rounding to the nearest whole number

So, the answer will be:

So, the Jupiter equator is 11 times the equator of Earth

The probability of passing one test or the other is given by:

0.63 = 63%.

In a Venn probability, two non-independent events are related with each other, as are their probabilities.

The "or probability" between these two events is given by the rule presented as follows:

P(A or B) = P(A) + P(B) - P(A and B)

In the context of this problem, these events are given as follows:

The probabilities of each event and the and probability are listed as follows:

P(A) = 0.58, P(B) = 0.24, P(A and B) = 0.19.

Hence the probability of passing one test or the other is calculated as follows:

P(A or B) = P(A) + P(B) - P(A and B)

P(A or B) = 0.58 + 0.24 - 0.19 = 0.63 = 63%.

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The estimation of the equation 1/6 + 5/6  is 1 (option C).

For rounding a fraction to the nearest whole number, use the "rounding half up" rule if necessary.

To estimate the solution for the equation 1/6 + 5/6, we can round each fraction to the nearest whole number.

The fraction 1/6 is closer to 0 than it is to 1, so we will round it to 0.

The fraction 5/6 is closer to 1 than it is to 0, so we will round it to 1.

Now we can estimate the solution for the equation as follows:

0 + 1 = 1

Therefore, the estimated solution for the equation 1/6 + 5/6 is 1.

The correct answer is C. 1.

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Answer: The temperature change of the water

The most important data that the student would have to record for the investigation that he is carrying out is temperature.

This is the term that is used to refer to the degree of hotness or the degree of coldness of a given body.

The temperature is the solution here because the factor that the student is set to find out would be how heat is able to transfer to water.

The variable that would be used to represent heat is going to be temperature. This is what would help to determine the amount of heat that has transferred.

This can be checked with the use of a thermometer. The investigation that the student is carrying out here would be what is called a research study.

Heat is one of the variables that is used in the research study. Therefore we can conclude by saying that the most important data that is going to be used in this research would be what is called temperature.

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