It takes 484848 minutes for 777 people to paint 777 walls. How many minutes does it take 202020 people to paint 202020 walls?

Answers

Answer 1

Answer:

Approximately 391 minutes taken by 20 people to paint 20 walls.                    

Step-by-step explanation:

Given : It takes 48 minutes for 7 people to paint 7 walls.

To find : How many minutes does it take 20 people to paint 20 walls?

Solution :

7 people to paint 7 walls in 48 minutes.

So, 1 people to paint 7 walls in [tex]\frac{48}{7}[/tex] minutes.

and 1 people to paint 1 walls in [tex]\frac{48}{7\times 7}[/tex] minutes.

Now, We have to find minutes does it take 20 people to paint 20 walls.

20 walls will be painted in [tex]\frac{48\times 20}{7\times 7}[/tex] minutes.

20 people to paint 20 walls in [tex]\frac{48\times 20\times 20}{7\times 7}[/tex] minutes.

i.e. [tex]\frac{48\times 20\times 20}{7\times 7}=\frac{19200}{49}=391.83[/tex]

Therefore, Approximately 391 minutes taken by 20 people to paint 20 walls.


Related Questions

What's the present value of $11,500 discounted back 5 years if the appropriate interest rate is 4.5%, compounded semiannually?

Answers

$1,500/(0.03)^10 = $1,116.14

General Idea:

We need to make use of the below formula to find the present value.

[tex] PV=\frac{FV}{(1+\frac{r}{n})^{nt}} \\ \\ Where:\\ FV \; is \; Future\; Value\; of \; money\\ r \; is\; Annual\; rate\; of\; interest\\ t\; is\; number\; of\; years\\ n\; is\; Number\; of\; periods\; based\; on\; compounding \; frequency [/tex]

Applying the Concept:

We are given the below information:

[tex] FV= \$11,500\\ \\ t=5\; years\\ \\ r=4.5 \%\\ \\ n=2\; (because\; given\; compounded\; semi-annually) [/tex]

We need to substitute the above information in the formula to find the Present value.

[tex] PV=\frac{11500}{(1+\frac{0.045}{2})^{2 \times 5}} =\frac{11500}{(1+0.0225)^{10}} =\frac{11500}{1.0225^{10}} \\ \\ PV \approx \$9206 [/tex]

CONCLUSION:

The present value of $11,500 discounted back 5 years if the appropriate interest rate is 4.5%, compounded semiannually is approximately 9206 dollars

In a multiple regression analysis what would likely be the culprit of a dramatic increase in the P-value of one of the variables?

Answers

This can happen if you add another independent variable to your regression model that is strongly correlated to some other variable already in the model.
This is called multicollinearity. 
If there is a high correlation between your independent variables can lead to problems.
It can lead to increased variance of the coefficient estimates and make the estimates very sensitive to minor changes in the model.

complete the steps to solve the polynomial equation x3-21x=-20 according to the rational root theorem, which number is a potential root of the polynomial?

Answers

x^3 - 21x + 20 = 0

potential roots are factors of 20    eg 1, 2 ,4 ,5, 10, 20  and the negative values of these
1 looks like a rots . Try it:-
f(1) = 1 - 21 + 20 = -20+20 = 0

Yes  1 is  a solution.

2 is not.

Try 4:-

4^3 - 21*4 + 20  =  64 - 84 + 20  = 0 

Try 5   No 
Try 10 - N0 
20 no.

Try -4  - No
-5:-

Yes  

Roots are  1, 4 and -5




Find the reference angle for 697 degrees

Answers

The answer is c. 23 degrees. 697-360 is 337. 360-337 is 23. 

im having trouble with this word problem. A train travels 160 km in the same time that a plane covers 720 km. if the speed of the plane is 20 km per hour less than 5 times the speed of the train, find both speeds. Not sure how to solve.

Answers

Plane is traveling at 780km

The speed of the train is 40 km/h, and the speed of the plane is 180 km/h.

To solve the word problem regarding the speeds of a train and a plane, we first let the speed of the train be x km/h. According to the problem, the plane's speed is 20 km/h less than 5 times the speed of the train, which can be expressed as 5x - 20 km/h. Since they both travel the same amount of time, we can set up an equation based on their speeds and distances traveled:

Time taken by the train = Distance / Speed of the train = 160 / x

Time taken by the plane = Distance / Speed of the plane = 720 / (5x - 20)

Since the time is the same for both:

160 / x = 720 / (5x - 20)

Cross-multiply to solve for x:

160(5x - 20) = 720x

800x - 3200 = 720x

80x = 3200

x = 40

You have 10 different video games. how many different ways can you arrange the games side by side on a​ shelf

Answers

Consider, please, this options:
option 1. 
for the 1st place 10 games, for the 2d place - 9 games, for the 3d - 8, etc., for the 10th place - 1 game. Then, using the rule of 'logic &': 10*9*8*7*6*5*4*3*2*1=3628800 ways.
option 2.
using formula of permutations (Pₓ=x!): P₁₀=10!=3628800 ways.

Answer: 3628800.

You can arrange the games side by side on a​ shelf in "3628800" ways.

According to the question,

Number of video games,

10

Now,

The amount of possible ways could you place the games side by side on some kind of shelf will be:

= [tex]10![/tex]

= [tex]10\times 9\times 8\times 7\times 6\times 5\times 4\times 3\times 2\times 1[/tex]

= [tex]3628800[/tex]

Thus the response above is appropriate.

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if f(x) = 2x+1/x-4, what is the value of f^-1 (3)?

Answers

=> y = (2x + 1) / (x - 4) 
=> xy - 4y = 2x + 1 
=> xy - 2x = 4y + 1 
=> x(y - 2) = 4y + 1 
=> x = (4y + 1) / (y - 2) 
=> f-1(x) = (4x + 1) / (x - 2) 
subtitute x = 3 
=> f-1(3) = 13

As per the inverse of a function, the value of [tex]f^{-1}(3)[/tex] is 13.

What is the inverse of a function?

"An inverse function is defined as a function, which can reverse into another function."

The given function is

[tex]f(x) = \frac{2x+1}{x-4}[/tex]

⇒ [tex]y = f(x) = \frac{2x+1}{x-4}[/tex]

⇒ [tex]xy - 4y = 2x + 1[/tex]

⇒ [tex]xy - 2x = 4y + 1[/tex]

⇒ [tex]x(y - 2)= 4y + 1[/tex]

⇒ [tex]x = \frac{4y+1}{y-2}[/tex]

⇒ [tex]f^{-1}(x) = \frac{4y+1}{y-2}[/tex]

Now, [tex]f^{-1}(3) = \frac{4(3)+1}{3-2} = (12+1) = 13[/tex]

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Mrs. Hicks has 35 students in her chemistry class. The ratio of girls to boys is 3:4. How many girls does she have in her class? Let both antecedents represent girls and let both consequence represent total students.

Answers

3+4 =7
35/7 = 5
5 * 3 = 15

 there are 15 girls

A magazine claims that 75% of all teenage boys have their own cellphones. A researcher wished to test the claim and selected a random sample of 60 teenage boys. She found that 54 had their own cell phones. At α = 0.01, should the claim be rejected?

Answers

yes, it is a comparison of .75 to .9 (I think?)
Not sure sorry!! Wish I could help




What is the area of a figure 36m×21×10×9×8×23×4×7×

Answers

It is actually simplified as 7*10 + 8*9+ 7*13 + 4*8 + 21+4, which is 290

Your friend earns $10.50 per hour. This is 125% of her hourly wage last year. How much did your friend earn per hour last year?

Answers

I believe it is 8.40

a juice can is shaped like a cylinder ]. it is 12 centimeters wide and 16 centimeters tall. find its volume to the nearest whole number . use 3.14

Answers

To find the volume of the cylinder-shaped juice can, calculate using the formula V = π r² h with the radius being half of the can's width and the given height. The volume is found to be approximately 1804 cm³ when rounded to the nearest whole number.

Calculating the Volume of a Cylinder:

To calculate the volume of a cylinder, you should use the formula V = π r² h. First, we need to determine the radius of the juice can. Since it is given that the can is 12 centimeters wide, that means the diameter is 12 centimeters, and therefore, the radius (r) is half of that, which is 6 centimeters. We also have the height (h) of the can, which is 16 centimeters. Plugging these values into the formula gives us:

V = 3.14 × 6² × 16

Now, we calculate:

V = 3.14 × 36 × 16

V = 3.14 × 576

V = 1803.84 centimeters cubed (cm³)

When we round this to the nearest whole number, the volume of the juice can is approximately 1804 cm³.

What is the solution to this equation? -4x + 2 = 26 A. x = 7 B. x = 6 C. x = -7 D. x = -6

Answers

The way you tell whether a value is a solution or not is to try it in the equation.

A. -4*7 +2 = -26 ≠ 26 . . . . not a solution

B. -4*6 +2 = -22 ≠ 26 . . . . not a solution

C. -4*-7 +2 = 30 ≠ 26 . . . . not a solution

D. -4*-6 +2 = 26 = 26 . . . . this is your solution

_____
Of course, you can also solve the equation.
.. -4x +2 = 26
.. -4x = 24 . . . . . . subtract 2 (the term that doesn't contain x)
.. x = -6 . . . . . . . . .divide by -4 (the coefficient of x)

What is the probability of flipping a coin six times in a row and getting three heads and three tails?

Answers

3/1 and 3/1 for both

Final answer:

The probability of flipping a coin six times and getting exactly three heads and three tails is calculated using the binomial formula and is found to be 31.25%.

Explanation:

The probability of flipping a coin six times and getting exactly three heads and three tails can be calculated using the binomial probability formula, which is P(x; n, p) = (n choose x) * p^x * (1-p)^(n-x), where 'n' is the number of trials, 'x' is the number of successes, and 'p' is the probability of success on any given trial.

In this instance, since we are flipping a fair coin, the probability 'p' of getting heads (success) on any single flip is 0.5. We want to find the likelihood of getting 'x' = 3 heads out of 'n' = 6 flips. Therefore, the equation becomes:

P(3; 6, 0.5) = (6 choose 3) * 0.5^3 * 0.5^(6-3)

The combination (6 choose 3) calculates the number of ways to choose 3 successes (heads) from 6 trials, which is 20. Plugging these values into the equation gives:

P(3; 6, 0.5) = 20 * (0.5^3) * (0.5^3) = 20 * (0.125) * (0.125) = 20 * 0.015625

This results in a probability of 0.3125, or 31.25%.

Therefore, the chance of flipping a coin six times and getting three heads and three tails is 31.25%.

In mathematics, central tendency is the tendency of data values to cluster around some central value. What does a measure of variability tell you about the central tendency of a set of data? Explain.

Answers

Variability tells us how spread out the data points are around the center. The smaller the variability, the more clustered the points are to the center. In terms of a bell curve, the smaller the variability, the taller and skinnier it will get where its tallest point is at the center. In contrast, a larger variability makes the distribution curve wider and flatter. 

use multiplication to create an equivalent fraction 6/5

Answers

Hello!

To get an equivalent fraction for 6/5, we must multiply the numerator and the denominator by the SAME number.

Let's multiply by 2.

6 × 2 = 12

5 × 2 = 10

Giving us 12/10.

So, 12/10 is equivalent to 6/5.

You can get more equivalent fractions by multiplying. 18/15, 24/20, 30/25 are all equivalent to 6/5.

I need help !! This packet is due tomorrow and I have no idea what I’m doing .

Answers

The proof would be as follows:

Given: angle M congruent to angle X; angle N congruent to angle Y; YO congruent to NZ.

1. YZ=YO+OZ; reason: segment addition postulate (YZ is made up of YO and OZ).

2. ON=NZ+OZ; reason: segment addition postulate (ON is made up of NZ and OZ).

3. YO=NZ; reason: given.

4. ON=YO+OZ; reason: substitution (since NZ is congruent to YO, we substitute YO for NZ).

5. ON=YZ; reason: substitution (since YZ=YO+OZ, we substitute YZ for YO+OZ).

6. MNO is congruent to XYZ; reason: AAS (we have 2 sides and a non-included angle in each triangle congruent, which is the angle-angle-side theorem).

Answer:

Given is :

∠M≅∠X

∠N≅∠Y

YO≅NZ

We have to prove that ΔMNO≅ΔXYZ

Using segment addition postulate we get YZ=YO+OZ and ON=NZ+OZ and YO=NZ is already given. Using substitution of YO for NZ; we get ON=YO+OZ

Now substituting YZ for YO+OZ we get ON=YZ and also YZ=YO+OZ.

Now applying AAS we get ΔMNO is congruent to ΔXYZ because of angle-angle-side theorem as we have already proved that two sides are congruent and a non-included angle in each triangle is congruent.

The volume v of a right circular cone of radius r and height h is given by v = 1/3 pi r^2 h. suppose that the height decreases from 20 in to 19.95 in and the radius increases from 4 in to 4.05 in. compare the change in volume of the cone with an approximation of this change using a total differential.

Answers

V = (π/3)*r^2*h
dV = (π/3)*(2r*h*dr +r^2*dh)

The approximate change in volume is
.. ∆V ≈ (π/3)*(2*4*20*0.05 +4^2*(-.05))
.. = (π/3)*(8 - 0.8) = 7.2(π/3) . . . . . in^3

The actual change in volume is
.. (π/3)*(4.05^2*19.95 -4^2*20) = 7.229875(π/3) . . . . . in^3

The actual change in volume is slightly more than the linear approximation would suggest.

what is domain of g(x)= square root plus one

Answers

Consider this option:
1. if the given function is
[tex]g(x)= \sqrt{x+1} [/tex]
then
2. domain is x+1≥0; ⇒ x≥-1 or x∈[-1;+oo).

answer: [-1;+oo)

Elias purchases a home for $38,900. The value of the home, in thousands of dollars, since his purchase is shown in the table. Find an exponential function that models the data. Round numerical values to the nearest hundredth. Let x be the number of years since the purchase. The function f(x) =()x models the data. Use the model to predict the home’s value. After 12 years, the home’s value will be about $thousand. After 35 years, the home’s value will be about $thousand.

Answers

Answer:

f(x)=39.59

(1.09)

After 12 years: 111

After 35 years: 808

The exponential function models the data would be f(x) = 39.59 (1.09). After 12 years, the home’s value will be about $111 thousand and After 35 years, it will be about $808 thousand.

What is a function?

A function is defined as a relation between the set of inputs having exactly one output each.

Elias purchases a home for $38,900.

Let x be the number of years since the purchase. The function f(x) =()x models the data.

f(x) = 39.59 (1.09)

by using the model to predict the home’s value.

After 12 years, the home’s value will be about $

111 thousand.

After 35 years, the home’s value will be about $

808 thousand.

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Factor.x ^2 + 17x + 72

Answers

so we need to factor it into (ax+b)(cx+d)
since we have 1x^2, a and c=1

so factor into (x+b)(x+d)
if we expand, we get
[tex](x+b)(x+d)=x^2+(b+d)x+bd[/tex]

so we need 2 numbers that add to get the middle number and multiply to get the last number


I would factor the last number and see which ones add to the middle one

what 2 numbers multily to get 72 and add to get 17?
hmm, list factor of 72 and add them
1+72=73, nope
2+36=38, nope
3+24=27, nope
4+13=17, yep


so it facotrs to (x+4)(x+13)

Find factors of x^2 and 72, that, when combined, will give you 17x

x ^2 + 17x + 72

x 9

x 8

(x + 9)(x + 8) is your factor.

hope this helps


If a salesperson sells 3/4 of an acre for $80,000, what was the price per square foot rounded to two decimal spaces?

Answers

if
1 acre=43560 foot
3/4 acre=32670 foot
now we know that
32670 sq foot............................80,000 dollars
1 sq foot...........................................?

the price is=80,000/32670=2.4487
rounded =2.45

Following are the calculation to the given question:

Given:

salesperson sells[tex]\bold{= \frac{3}{4}}[/tex]

acre= 80,000

To find:

price per square foot rounded to two decimal spaces=?

Solution:

Therefore

[tex]1 \ acre=43560\ foot \\\\ \frac{3}{4}\ acre=32670\ foot[/tex]

Calculation

[tex]32670 \ sq \ foot = \$80,000 \\\\1 \ sq \ foot =? \\\\[/tex]

Calculating the price:

[tex]=\frac{80,000}{32670}=2.4487 \approx 2.45[/tex]

Therefore, the final answer is "$2.45".

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5x+13≥−37. Find the solution set of the inequality.

Answers

5x ≥-50
The answer is: x≥-10

The solution of the inequality 5x + 13 ≥ − 37 will be greater than or equal to negative 10.

What is inequality?

Inequality is defined as an equation that does not contain an equal sign. Inequality is a term that describes a statement's relative size and can be used to compare these two claims.

The inequality is given below.

5x + 13 ≥ − 37

Simplify the inequality for 'x', then we have

5x + 13 ≥ − 37

5x ≥ − 50

x ≥ − 10

The solution of the inequality 5x + 13 ≥ − 37 will be greater than or equal to negative 10.

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The circumference of a circle is 10π cm. What is the Radius of the circle? A) 4 cm B) 5 cm C) 10 cm D) 20 cm


ASAP

Answers

The answer is B 
C=2pieR 
if C=10pie 
then you have to devide 10 by 2 
Answer is B 5 cm is correct. C=πd; thus, d=C/π. therefore, d=10π π=10; 2r=d; 2r=10; r= 5 cm

what is the coefficient of the term 13a in the expression 13a+6b

Answers

The coefficient is 13.

What is the fractional notation for 0.097

Answers

well, notice first off, 0.097, has three digits after the decimal point, thus it has three decimals.  What does that mean?  well, "we add as many zeros to the bottom as there are decimals, and lose the dot", what the dickens?   anyhow, let's do so,

[tex]\bf 0.\underline{097}\implies \cfrac{0097}{1\underline{000}}\implies \cfrac{97}{1000}[/tex]

Angle D is a vertical angle to F. The measure of D is 53° . What is the measure of F?

Answers

The measure of F is 53°
Final answer:

Angle F will have the same measure as angle D, which is 53°, because they are vertical angles and thus congruent.

Explanation:

The question asks about the measure of angle F given that it is a vertical angle to angle D, which measures 53°. In geometry, vertical angles (also known as opposite angles) are pairs of non-adjacent angles formed when two lines intersect. Vertical angles are congruent, which means they have the same measure. Therefore, since angle D is 53°, angle F, being its vertical angle, will also have a measure of 53°.

Angle D and angle F are vertical angles, which means they are congruent. If angle D measures 53°, then angle F will also measure 53°. This is because vertical angles are equal in measure.

Create a pattern with the rule n x 2 + 1

Answers

To create this pattern, you can start with the number zero and apply this math.  0 x 2 +1 = 1.  The next number would be found by taking 1 x 2 + 1=3.  After that 3 x 2 + 1 = 7.  The next number in the pattern would be found by taking 7 x 2 +1.  Essentially, you are just taking the answer you just got and doubling it and then adding 1.  Here is the pattern that would be created beginning with 0.  0, 1, 3, 7, 15, 31, 63, etc...

The pattern that can be created with the rule n x 2 + 1 is 1, 3, 5, 7, 9, 11

Given:

n × 2 + 1

= 2n + 1

where

n = number of terms

when n = 0

2(0) + 1

0 + 1

= 1

when n = 1

2(1) + 1

= 2 + 1

= 3

when n = 2

2(2) + 1

4 + 1

= 5

when n = 3

2(3) + 1

6 + 1

= 7

when n = 4

2(4) + 1

8 + 1

= 9

Therefore, the pattern that can be created with the rule n x 2 + 1 is 1, 3, 5, 7, 9, 11

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George has $23 to spend on art supplies he wants to buy markers papers and glue if the total cost of markers and papers is more than $14 which inequality represents the dollar amount P George can spend on glue

Answers

p< 9
i think that is the correct answer

It is 20 minutes after 8:00 what is the correct way to write the time.

Answers

8:20 hope this helps
It’s 8:20 I think it’s right
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