All categories

2 years ago

If you know the answer to these plz answer.

Mathematics

1 answer:

kondaur [170]2 years ago

7 0

Answer:

Step-by-step explanation:

You can readily see from the diagram, above, that the side length of the middle cube will be between 3 and 4. You want to determine to the nearest hundredth what value between 3 and 4 represents the side length of the cube whose volume is 45 units^3.

Please note: the middle cube has been mislabeled. Instead of volume = 30 units^3, the volume should be 45 units^3.

Here's the procedure:

Guess an appropriate s value. Let's try s = side length = 3.5

Cube this: (3.5 units)^3 = 42.875. Too small. Choose a larger possible side length, such as 3.7: 3.7^3 = 50.653. Too large.

Try s = 3.6: 3.6^3 = 46.66. Too large.

Choose a smaller s, one between 3.5 and 3.6: 3.55^3 = 44.73. This is the best estimate yet for s. Continue this work just a little further. Try s = 3.57. Cube it. How close is the result to 45 cubic units?

You might be interested in

In one month, Jillian made 36 local phone calls and 20 long distance calls. What was her ratio of local calls to long distance c

Gelneren [198K]

<span> In one month, Jillian made 36 local phone calls and 20 long distance calls. The ration can be calculated by dividing the amount of calls for each. It is as follows:

36/20 = 9/5

Therefore, the correct answer is option C. Hope this answers the question.</span>

8 0

2 years ago

The Environmental Protection Agency (EPA) publishes fuel economy values that are known to be good estimates of the fuel economy

r-ruslan [8.4K]

Answer:

The 90% confidence interval for the mean combined fuel economy for Ford Explorers is between 22.95 and 23.63 mpg.

Step-by-step explanation:

We have the standard deviation for the sample, which means that the t-distribution is used to solve this question.

The first step to solve this problem is finding how many degrees of freedom, we have. This is the sample size subtracted by 1. So

df = 16 - 1 = 15

90% confidence interval

Now, we have to find a value of T, which is found looking at the t table, with 15 degrees of freedom(y-axis) and a confidence level of $1 - \frac{1 - 0.9}{2} = 0.95$ . So we have T = 1.7531

The margin of error is:

$M = T\frac{s}{\sqrt{n}} = 1.7531\frac{0.78}{\sqrt{16}} = 0.34$

In which s is the standard deviation of the sample and n is the size of the sample.

The lower end of the interval is the sample mean subtracted by M. So it is 23.29 - 0.34 = 22.95 mpg

The upper end of the interval is the sample mean added to M. So it is 23.29 + 0.34 = 23.63 mpg

The 90% confidence interval for the mean combined fuel economy for Ford Explorers is between 22.95 and 23.63 mpg.

7 0

2 years ago

HEEELLLLPPPPP PLEAAAASE ANSWER QUICK REAL ASSIGNMENT NO FAKE ANSWERS

miv72 [106K]

$- {90u}^{2} \times (2u - 5)$

7 0

2 years ago

How do i use properties of exponents

STatiana [176]

You can use the properties of exponents in three ways: Products of Power and Power to Power

Explanation:

Product of a Power: When you multiply exponentials with the same base, you add their exponents

Power to a Power: When you have a power to a power, you multiply the exponents.
Quotient of Powers: When you divide exponentials with the same base, you subtract the exponents.

3 0

3 years ago

Cuál es el menor número entero que, disminuido en 8, resulta menor que su triple

Mars2501 [29]

Answer:

-3

Step-by-step explanation:

Let x = the number

Then 3x = its triple, and the condition is:

x - 8 < 3x

Subtract x from each side

-8 < 2x

Divide each side by 2

-4 < x

Reverse the inequality

x > -4

The smallest integer greater than -4 is -3.

Check:

-3 - 8 < 3(-3)

-11 < -9

It checks.

5 0

3 years ago