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goldfiish [28.3K]
3 years ago
10

Please please help

Mathematics
2 answers:
Butoxors [25]3 years ago
8 0

Answer:

i dont know but i need points lol

Step-by-step explanation:

Alex_Xolod [135]3 years ago
7 0

1. Diameter= 14-2-2 = 10 feet

2. 11x 14 = 154

1/2 x 3.14 x 5^2 = 39.25

Area = 154-39.25 = 114.75 square feet

3. 114.75 x 1.50 = $172.13

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In a random sample of 75 individuals, 52 people said they prefer coffee to tea. 99.7% of the population mean is between what two
marshall27 [118]
Sample size, n = 75
Point estimate, p = 52/75 = 0.693
Z at 99.7% confidence interval ≈ 2.96

Population mean interval = p+/- Z*Sqrt [p(1-p)/n]

Substituting;
Population mean interval = 0.693 +/- 2.96*Sqrt [0.693(1-0.693)/75] = 0.693+/-0.158 = (0.535,0.851) or (53.5%,85.1%)
7 0
3 years ago
Please help me idk this
tatiyna

Answer:

2.25

Step-by-step explanation:

The question gives us one hint. That side of the square is 1.5"

Because it gives us that, we can use that to find the area. Because it is a square, all of the sides are the same length.

To find the area it is basexheight

So that is why the answer is 2.25 because 1.5x1.5=the area of the square

8 0
3 years ago
Read 2 more answers
The volume of a right circular cone that has a height of 13 m and a base with a diameter of 3.4 m. Round your answer to the near
Mamont248 [21]

Answer:

The volume of right circular cone having height = 13 \ m and Diameter =   3.4 \ m is 39.4\ cubic\ meter.

Step-by-step explanation:

Diagram of the given scenario is shown below.

Given that

Height of a right circular cone is 13 \ m.

Diameter of the right circular cone is 3.4 \ m.

To find: The volume of a right circular cone.

So,  From the question,

                                       Height = \ 13 \ m\\diameter = 3.4\ m

                                       Radius = \frac{diameter}{2}= \frac{3.4}{2}

 ⇒                                  Radius = 1.7\ m

Now

    Volume of right circular cone = \frac{1}{3}\pi  r^{2}h

                                                      =\frac{1}{3}\times\frac{22}{7} \times (1.7)^{2}\times 13

                                                      =   \frac{826.54}{21}

                                                      = 39.4\ cubic\ meter.

Therefore,

The volume of right circular cone having height = 13 \ m and Diameter =   3.4 \ m is 39.4\ cubic\ meter.

8 0
3 years ago
A coach is assessing the correlation between the number of hours spent practicing and the average number of points scored in a g
cricket20 [7]

Answer:

a) r=\frac{9(396)-(18)(153)}{\sqrt{[9(51) -(18)^2][9(3141) -(153)^2]}}=1  

We have a perfect linear relationship between the two variables

b) m=\frac{90}{15}=6  

Nowe we can find the means for x and y like this:  

\bar x= \frac{\sum x_i}{n}=\frac{18}{9}=2  

\bar y= \frac{\sum y_i}{n}=\frac{153}{9}=17  

And we can find the intercept using this:  

b=\bar y -m \bar x=17-(6*2)=5  

So the line would be given by:  

y=6 x +5  

c) For this case the slope indicates that for each increase of the number of hours in 1 unit we have an expected increase in the score about 6 units.

And the intercept 5 represent the minimum score expected for any game

Step-by-step explanation:

We have the following data:

Number of hours spent practicing (x) 0 0.5 1 1.5 2 2.5 3 3.5 4

Score in the game (y) 5 8 11 14 17 20 23 26 29

Part a

The correlation coefficient is given:

r=\frac{n(\sum xy)-(\sum x)(\sum y)}{\sqrt{[n\sum x^2 -(\sum x)^2][n\sum y^2 -(\sum y)^2]}}  

For our case we have this:

n=9 \sum x = 18, \sum y = 153, \sum xy = 396, \sum x^2 =51, \sum y^2 =3141  

r=\frac{9(396)-(18)(153)}{\sqrt{[9(51) -(18)^2][9(3141) -(153)^2]}}=1  

We have a perfect linear relationship between the two variables

Part b

m=\frac{S_{xy}}{S_{xx}}  

Where:  

S_{xy}=\sum_{i=1}^n x_i y_i -\frac{(\sum_{i=1}^n x_i)(\sum_{i=1}^n y_i)}{n}  

S_{xx}=\sum_{i=1}^n x^2_i -\frac{(\sum_{i=1}^n x_i)^2}{n}  

With these we can find the sums:  

S_{xx}=\sum_{i=1}^n x^2_i -\frac{(\sum_{i=1}^n x_i)^2}{n}=51-\frac{18^2}{9}=15  

S_{xy}=\sum_{i=1}^n x_i y_i -\frac{(\sum_{i=1}^n x_i)(\sum_{i=1}^n y_i){n}}=396-\frac{18*153}{9}=90  

And the slope would be:  

m=\frac{90}{15}=6  

Nowe we can find the means for x and y like this:  

\bar x= \frac{\sum x_i}{n}=\frac{18}{9}=2  

\bar y= \frac{\sum y_i}{n}=\frac{153}{9}=17  

And we can find the intercept using this:  

b=\bar y -m \bar x=17-(6*2)=5  

So the line would be given by:  

y=6 x +5  

Part c

For this case the slope indicates that for each increase of the number of hours in 1 unit we have an expected increase in the score about 6 units.

And the intercept 5 represent the minimum score expected for any game

5 0
3 years ago
Order these numbers from least to greatest. 80 , −9.75 , −9.7 , −24825
Diano4ka-milaya [45]
Least is on top, Greatest is on bottom
-24,825
-9.75
-9.7
80
8 0
3 years ago
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