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3 years ago

Which products are negative?

Mathematics

1 answer:

Aliun [14]3 years ago

3 0

Both A and D are negative products.

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The sales tax rate on a new vehicle is 6%. If the vehicle is $8,000, then how much will be charged for sales tax?

Dimas [21]

$8000 x 0.06
= 480

8000 + 480
= $8480

you will pay $8480

8 0

3 years ago

What is the value of the 4 in the number 27.43 write your answer as a fraction

egoroff_w [7]

Answer:

⅖

Step-by-step explanation:

In 27.43,

There are 2 tens, 7 units, 4 tenths and 2 hundredths

4/10

2/5

6 0

3 years ago

I need help with this math question

algol13

Third option. The letter has neither rotate or symmetry

8 0

3 years ago

The number of motor vehicles registered in millions in the US has grown as follows:

zysi [14]

Answer:

a) Figure attached

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

For our case we have this:

n=10 $\sum x = 75.819, \sum y = 43.5231, \sum xy = 330.0321, \sum x^2 =574.8598, \sum y^2 =192.8274$

$r=\frac{10(330.0321)-(75.81948)(43.5231)}{\sqrt{[10(574.8598) -(75.819)^2][10(192.8274) -(43.5231)^2]}}=0.989$

So then the correlation coefficient would be r =0.989

Step-by-step explanation:

Previous concepts

The correlation coefficient is a "statistical measure that calculates the strength of the relationship between the relative movements of two variables". It's denoted by r and its always between -1 and 1.

Solution to the problem

Part a

Year (x): 1940, 1945 1950, 1955, 1960, 1965, 1970, 1975, 1980, 1985

Vehicles (Y): 32.4, 31.0, 49.2, 62.7, 73.9, 90.4, 108.4, 132.9, 155.8, 171.7

After apply natural log for the two variables and create the scatterplot in excel we got the following result on the figure attached.

Part b

And in order to calculate the correlation coefficient we can use this formula:

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

For our case we have this:

n=10 $\sum x = 75.819, \sum y = 43.5231, \sum xy = 330.0321, \sum x^2 =574.8598, \sum y^2 =192.8274$

$r=\frac{10(330.0321)-(75.81948)(43.5231)}{\sqrt{[10(574.8598) -(75.81948)^2][10(192.8274) -(43.5231)^2]}}=0.989$

So then the correlation coefficient would be r =0.989

4 0

2 years ago

24 and 25 please )))))))

Elena L [17]

Answer:

see the angle is more than 90 and it's obtuse in nature so u can find only supplement of that angle

85,106

4 0

3 years ago