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3 years ago

I need help ASAP ❗️❗️❗️

1 answer:

8 0

It took them 4 days to install 480 chairs which means if they were working at a constant rate they got 120 chairs installed daily. with 360 chairs left that means in 3 days they will finish. so overall, it took the workers 7 days to finish, or a week.

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How much water should be added to 1 gallon of pure antifreeze to obtain a solution that is 80% antifreeze?

Georgia [21]

Answer:

The amount of water to be added is ¹/₄ gallon

Step-by-step explanation:

Given;

amount of pure antifreeze at 100% = 1 gallon

let the amount of water to be added with 0% antifreeze = (x) gallon

then, the amount of mixture at 80% antifreeze = (x + 1) gallon

For conservation of mass, we will have the following equation;

(1 x 1) + (0)(x) = 0.8(x +1)

1 = 0.8x + 0.8

0.8x = 1 - 0.8

0.8x = 0.2

x = 0.2 / 0.8

x = ²/₈

x = ¹/₄ gallon

Therefore, the amount of water to be added is ¹/₄ gallon

8 0

3 years ago

If you know this please help

Anuta_ua [19.1K]

Answer:

its c hope this helps:)

Step-by-step explanation:

4 0

3 years ago

On September 25, 2011 Michael Vick, the quarterback for the Philadelphia Eagles broke his non-throwing hand in a football game a

miskamm [114]

Answer:

D. We are 95% confident that between about 22% and 28% of ESPN Viewers thought the Eagles would still win the division.

Step-by-step explanation:

We have to calculate a 95% confidence interval for the population proportion. The population is made up of ESPN viewers.

The sample proportion is p=0.25.

The standard error of the proportion is:

$\sigma_p=\sqrt{\dfrac{p(1-p)}{n}}=\sqrt{\dfrac{0.25*0.75}{914}}\\\\\\ \sigma_p=\sqrt{0.00021}=0.014$

The critical z-value for a 95% confidence interval is z=1.96.

The margin of error (MOE) can be calculated as:

$MOE=z\cdot \sigma_p=1.96 \cdot 0.014=0.028$

Then, the lower and upper bounds of the confidence interval are:

$LL=p-z \cdot \sigma_p = 0.25-0.028=0.222\\\\UL=p+z \cdot \sigma_p = 0.25+0.028=0.278$

The 95% confidence interval for the proportion of ESPN viewers is (0.222, 0.278) or (22.2%, 27.8%).

7 0

3 years ago

Which statement regarding the diagram is true?

babymother [125]

Answer: C

Step-by-step explanation:

6 0

3 years ago

Read 2 more answers

The function h(x) = g(x + 2) - 1, complete the table for h(x).

Dafna1 [17]

Answer:

x g(x + 2)-1 h(x)

-2 g(-2+2)-1 -1

-1 g(-1+2)-1 0

0 g(0+2)-1 1

1 g(1+2)-1 2

2 g(2+2)-1 3

Part A: 3

Part B: -1

Step-by-step explanation:

When you have questions like these all you have to do is plug in and solve.

For example I will do h(2) & h(-2) for reference.

h(2):

$(2+2)-1\\4-1\\3$

h(-2):

$(-2+2)-1\\0-1\\-1$

4 0

3 years ago