admin

2 months ago

Guest #4212

2 months ago

**Answer: **The answer is** 314.28 cm² (approx.).**

**Step-by-step explanation: **Given that an engineer is going to install a new water pipe. The diameter of this circular pipe is, d = 20 cm.

We need to find the area 'A' of the circular cross-section of the pipe.

Given, diameter of the circular section is

So, the radius of the circular cross-section will be

Therefore, cross-sectional area of the pipe is

**Thus, the answer is 314.28 cm² (approx.).**

Guest #4213

2 months ago

**Answer:**

100

**Step-by-step explanation:**

Question

what is the 14 letter word with the definition of an example showing a statement is not true. it is c--n-e-t--m-l-

Solution 1

The word is counterexample.

Your second t is incorrect.

It should be an e.

Your second t is incorrect.

It should be an e.

Question

What is the product written in scientific notation? (2.1 x 10–2)(3.2 x 10–4)
a. 6.72 x 108
b. 6.72 x 10–6
c. 5.3 x 102
d. 5.3 x 10–6

Solution 1

First, you multiply 2.1 by 3.2, which gives you the answer of 6.72. Then, you multiply 10-2 by 10-4. One rule about multiplying exponents, you just add the exponents. So 10-2 x 10-4 = 10-6. Finally you get the answer of C. 6.72 x 10-6.

Question

The combined cost of one advance ticket and one same-day ticket to a show was $50. it is known that 17 advance tickets were sold and 48 same-day tickets were sold, for total receipts of $1842. what was the price of each kind of ticket?

Solution 1

1 advance + 1 same-day = $50

17 advance + 17 same-day = $50 x 17 = $850

$1842 - $850 = $992

48 - 17 = 31 same-day

31 same-day = $992

1 same-day = $32

1 advance + 1 same-day = $50

1 advance + $32 = $50

1 advance = $50 - $32 = $18

**Answer: same day ticket costs $32 and advance-day ticket costs $18.**

17 advance + 17 same-day = $50 x 17 = $850

$1842 - $850 = $992

48 - 17 = 31 same-day

31 same-day = $992

1 same-day = $32

1 advance + 1 same-day = $50

1 advance + $32 = $50

1 advance = $50 - $32 = $18

Solution 2

A same day ticket costs $32 and an advance day ticket costs $18. Hope this helpd.

Question

$80 is divided Between two men such that 1/4 of one persons share is equal to 1/6 Of the other how much will each man receive

Solution 1

X + y = 80

y/4 = x/6

6y = 4x

4x + 4y = 320

6y + 4y = 320

10y = 320

y = 32

6(32) = 4x

x = 48

Answer: The amounts are $32 and $48.

y/4 = x/6

6y = 4x

4x + 4y = 320

6y + 4y = 320

10y = 320

y = 32

6(32) = 4x

x = 48

Answer: The amounts are $32 and $48.

Question

evan graphs the function h(x)=x^2+4. Victor graphs the function g(x)=(x+4)^2. Which statements are true regarding the two graphs

Solution 1

Can you please add the statements? ThankS!

Question

A line of best fit predicts that when x equals 35, y will equal 34.785, but actually equals 37. What is the residual in this case?

Solution 1

We know that

Residual Value = Observed Value– Predicted Value

in this problem

Observed Value=37

Predicted Value=34.785

Residual Value = 37-34.785------> 2.215

positive values for the residual (on the y-axis) mean that the prediction was too low

**the answer is**

**2.215**

Residual Value = Observed Value– Predicted Value

in this problem

Observed Value=37

Predicted Value=34.785

Residual Value = 37-34.785------> 2.215

positive values for the residual (on the y-axis) mean that the prediction was too low

Question

What is the equation of the axis of symmetry of the graph of y + 3x – 6 = –3(x – 2)squared + 4?

Solution 1

**Answer:**

x = 3/2

**Step-by-step explanation:**

That is quite long and drawn out, so we have to get it down to a single quadratic equation, set equal to 0.

Begin by expanding the right side to get

then multiplying in the -3 to get

Now we will combine all the like terms and get everything on one side of the equals sign, and set it equal to 0:

In order to find the equation of the axis of symmetry we have to put it into vertex form, which is accomplished by completing the square on this quadratic.

In order to complete the square, the leading coefficient has to be a +1. Ours is a -3, so we will factor that out. First, though, now that it is set to equal 0, we will move the constant, -2, over to the other side, isolating the x terms.

Now we can factor out the -3:

The rules for completing the square are as follows:

Take half the linear term, square it, and add it to both sides. Our linear term is 3. Half of 3 is 3/2, and squaring that gives you 9/4. We add into the parenthesis on the left a 9/4, but don't forget about that -3 hanging around out front that refuses to be ignored. We didn't add in just a 9/4, we added in (-3)(9/4) = -27/4:

In the process of completing the square we created a perfect square binomial on the left. Stating that binomial and simplifying the addition on the right gives us:

We can determine the axis of symmetry at this point. Because this is a positive x-squared polynomial, the axis of symmetry is in the form of (x = ) and what it equals is the h coordinate of the vertex. Our h coordinate is 3/2; therefore, the axis of symmetry has the equation x = 3/2

Question

How many radii does a circle have? Explain.

Solution 1

Radii is defined as the line joining the centre of the circle to a point on the circumference

as there are infinite points on a circle

therefore there are infinite number of radii and hence there is no fixed number.

as there are infinite points on a circle

therefore there are infinite number of radii and hence there is no fixed number.

Question

Multiply 12.57 by 4.11. Round your answer to the nearest hundredth. a. 51.25
b. 51.66
c. 49.45
d. 52.66

Solution 1

When you are going to multiply 12.57 by 4.11, the result would be 51.6627.

To round off the result to the nearest hundredth, it would become 51.66.

According to the rules of rounding off a number, if the number after the rounded off digit is more than or equal to 5, you have to add 1 to the rounded off digit. But if it is less than 5, then the rounded off digit would be still the same. In this case, the rounded off digit which is 6 would still be the same since the number after that is 2 which is less than 5.

So, the answer is letter B which is 51.66

To round off the result to the nearest hundredth, it would become 51.66.

According to the rules of rounding off a number, if the number after the rounded off digit is more than or equal to 5, you have to add 1 to the rounded off digit. But if it is less than 5, then the rounded off digit would be still the same. In this case, the rounded off digit which is 6 would still be the same since the number after that is 2 which is less than 5.

So, the answer is letter B which is 51.66

Solution 2

Answer: 51.66

Step-by-step explanation:

Question

Jeremy, Sue, and Holly are siblings. Sue was born three years before Holly, and Jeremy was born five years before Sue. The product of Sue's age and Jeremy's age is at most 150. If x represents the age of Holly, which inequality can be used to find the age of each sibling?

Solution 1

**Answer:**

Inequality to find the age of siblings is **x²+ 11x + 24 ≤ 150.**

**Step-by-step explanation:**

Let the age of Holly is x years. Now from the statements of the question we will form the equations.

Sue was born three years before Holly.

Sue = Holly + 3 = x + 3------(1)

Jeremy = Sue + 5

From equation (1)

Jeremy = (x + 3) + 5 = x + 8------(2)

Now statement says the product of Sue's age and Jeremy's age is at most 150.

Sue × Jeremy ≤ 150

(x + 3)(x + 8) ≤ 150

**x² + 11x + 24 ≤ 150**

Therefore inequality **x² + 11x + 24 ≤ 150 **can be used to find the age of each sibling.

Solution 2

**Answer: x^2+11x+24 </= 150**

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