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3 years ago

7

Factory A has printed 650 books,and prints 50 new books every week. Factory B has printed 200 books and prints 100 books every w

eek. How many weeks will it be until Factor B has printed as many as book as Factory A?

1 answer:

hram777 [196]3 years ago

8 0

The Answer Is 9

650 + 50(9) = 1,100

200 + 100(9) = 1,100

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Mountain Climbers use a general rule of thumb which estimates that the temperature will drop 3.5 degrees Fahrenheit for every 10

Evgesh-ka [11]

Answer:

55.5F

Step-by-step explanation:

y = mx + b

m = slope = -3.5/1000

distance = x = 1000

b = temperature at x = 0 = 59F according to https://www.universalweather.com/blog/international-standard-atmosphere-how-it-affects-flight-understanding-the-basics/

temperature = y = ?

y = -.0035(1000) + 59

y = 55.5

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4 years ago

-4x -6 = 3 - 5x<br> Solve for x pls

ycow [4]

Answer:

x = 9

Explanation:

-4x - 6 = 3 - 5x

Add 6 to both sides

-4x - 6 + 6 = 3 - 5x + 6

-4x = -5x + 9

Add 5x to both sides

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3 years ago

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Write 25.75% as a decimal. thx :)

professor190 [17]

Answer:

0.2575

<em>That’s your answer! </em>:)

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What do projections do to things like shapes,direction,distance,and areas on map?

Komok [63]

A distortion is the alteration of the original shape (or other characteristic) of an object, image, sound, waveform or other form of information or representation. Distortion is usually unwanted. In some fields, distortion is desirable, such as electric guitar (where distortion is often induced purposely with the amplifier or other electronic effect to achieve a unique sound). The slight distortion of analog tapes and vacuum tubes is considered pleasing in certain situations. The addition of noise or other extraneous signals (hum, interference) is not considered to be distortion,[citation needed] though the effects of distortion are sometimes considered noise.
In Geographical Information Systems, portraying the world on a flat map is necessary to appropriately observe the world in a smaller, yet more convenient way. Unfortunately, anytime that a round object is broken up and flattened, it creates many areas of distortion. Some areas stretch, while others are cut. When the earth is projected onto a flat surface there are at least four different types of distortion: distance, direction, angle, and area. It is impossible to preserve all four means of distortion on one flat projection.

So I think the answer is A?

I don’t know but I think goodluck?

más inteligente?

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3 years ago

A new sales training program has been instituted at a rent-to-own company. Prior to the training, 10 employees were tested on th

Lunna [17]

Answer:

C. H0: µD = 0, HA: µD <0

Step-by-step explanation:

We assume that the paired sample data are simple random samples and that the differences have a distribution that is approximately normal. So for this case is better apply a paired t test.

A paired t-test is used to compare two population means where you have two samples in which observations in one sample can be paired with observations in the other sample. For example if we have Before-and-after observations (This problem) we can use it.

Let put some notation

x=test value for pretest , y = test value for posttest

x: 66, 94, 87, 84, 76, 88

y: 75, 100, 93, 85, 75, 90

The system of hypothesis for this case are:

Null hypothesis: $\mu_D \geq 0$

Alternative hypothesis: $\mu_D < 0$

Because the difference D is defined as Pretest-Postest. And we want to see if the postets score is higher than the pretest with th training.

The first step is calculate the difference $d_i=x_i-y_i$ and we obtain this:

d: -9, -6, -6, -1, 1, -2

The second step is calculate the mean difference

$\bar d= \frac{\sum_{i=1}^n d_i}{n}= \frac{-23}{6}=-3.833$

The third step would be calculate the standard deviation for the differences, and we got:

$s_d =\frac{\sum_{i=1}^n (d_i -\bar d)^2}{n-1} =3.763$

The 4 step is calculate the statistic given by :

$t=\frac{\bar d -0}{\frac{s_d}{\sqrt{n}}}=\frac{-3.833 -0}{\frac{3.763}{\sqrt{6}}}=-2.494$

The next step is calculate the degrees of freedom given by:

$df=n-1=6-1=5$

Now we can calculate the p value, since we have a left tailed test the p value is given by:

$p_v =P(t_{(5)}$

The p value is lower than the significance level assumed $\alpha=0.05$ , so then we can conclude that we can reject the null hypothesis. So we can say that the differences between Pretest and Posttest $\mu_{pretest}-\mu_{postest}$ are less than 0.

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3 years ago