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pentagon [3]
3 years ago
5

Dave bought 18 packets of cookies for $21.60. Each packet of cookies contains 20 cookies. find the cost of each cookie to the ne

arest tenth of a cent
Mathematics
1 answer:
zalisa [80]3 years ago
6 0

Answer:

16.7 cents for one cookie

Step-by-step explanation:

18 multiplied by 20 is 360. 360 divided by 21.60 equals 16. 66 which rounds to 16.7 cents per cookie

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A student working on a summer internship in the economic research department of a large corporation studied the relation between
OverLord2011 [107]

Answer:

Step-by-step explanation:

Hello!

Y: sales of a product in a marketing district (million dollars)

X: population in a marketing district (million persons)

The objective is to test if there is a linear association between the sales of a product and the population of a marketing district.

Parameter; Estimated Value; 95 Percent Confidence limits

Intercept          7.43119                -1.18518        16.0476

Slope             0.755048            0.452886       1.05721

a.

To test if there is or not an association between these two variables, you have to do a hypothesis test for the slope. If the slope is equal to zero, there is no linear association between the two variables, if the slope is different from zero, then there is a linear association between the variables.

So the student's hypotheses are:

H₀: β = 0

H₁: β ≠ 0

The data the student used to conclude is the 95%CI for the slope [0.452886;1.05721]

To be able to decide over an hypothesis test using a confidence interval there are several conditions to be met, one of them is that the confidence level and the significance level should be complementary, this means that if the interval was constructed using 1 - α= 0.95, then the hypothesis test should be conducted with a significance level of α= 0.05.

Considering that the value of the slope stated in the null hypothesis is not included in the given interval, i.e. zero is not included in the CI, then the decision is to reject the null hypothesis.

Then it can be concluded that there is a linear association between the sales of a product and the population in a marketing district.

b.

Although in the context of the variables of study it makes no sense that the estimate of the intercept takes negative numbers, keep in mind that mathematically if possible and correct. This means that obtaining a negative estimate of the intercept does not represent a calculation error or problem for the regression model. In general, when this occurs, a footnote is made indicating has no biological meaning or sense in context.

After all, what you have done with the estimate is a mathematical assertion of the social variables.

I hope it helps!

3 0
3 years ago
Find the product of 3 1/8 and 1 2/7. Express your answer in simplest form. 4 1/56 3 2/56 2 31/72 4 1/5
eduard

Answer:1/56

Step-by-step explanation:

5 0
2 years ago
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Opal made t-shirts. It cost $39 to print one shirt. It costs $75 for 10 shirts. Write an equation to represent the
RUDIKE [14]

Answer:

39 X 10=75

Step-by-step explanation:

‍♀️

4 0
2 years ago
Wilbur spends 2/3 of his income, share 1/12, and saves the rest. What part of his income does he save? Give the answer in simple
scoundrel [369]

Answer:

<em><u>1/4 of his income.</u></em>

Step-by-step explanation:

If Wilbur spends 2/3 of his income, 1/3 or 4/12 of it is left for other purposes (It is easier if everything has a common denominator of 12). And if he shares 1/12 of that remaining amount, there is 3/12 left. And when we simplify 3/12, we get <u>1/4</u>.

*Mark me brainliest!*

7 0
3 years ago
Distance between (-6,-7) and (-4,-1)
kirill115 [55]

Answer:

i believe it is (3,6) im not 100% sure though

Step-by-step explanation:

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