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4 years ago

12

The temperature is -3°F at 7:00 A.M. During the next 4 hours, the temperature increases 21°F. What is the temperature at 11:00 A

.M.?

1 answer:

3241004551 [841]4 years ago

4 0

Answer: 18°F

Step-by-step explanation: if you add 21 and -3 you get 18

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Alice wants to fence in a rectangular pay area for her rabbits. The length of the area should be at least 20ft, and the distance

dlinn [17]

This looks like common core which is never straight forward.It seems as though they are asking for the perimeter and not area,since they used feet for the distance around instead of sq.ft.

6 0

3 years ago

BRAINLIEST + POINTS!

sertanlavr [38]

Answer:

the correlation coefficient of the line of best fit is, 0.98247.

Step-by-step explanation:

Correlation Coefficient are used to find how strong relationship between the data. It expressed its values between +1 and -1. It is represented by r.

* if 0<r<1 indicates a strong positive relationship.

* -1<r <0 indicates a strong negative relationship.

* r=0 indicates no relationship at all.

The formula for this :

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

Given the data: (-3, -40) , (1, 12), (5, 72) and (7,137)

Here, n = 4

To calculate the correlation coefficient r;

Substitute the values of data in above formla of r , as shown in the Figure 1:

then;

$r=\frac{4\cdot 1451-(10)(181)}{[4\cdot84-(10)^2][4\cdot 256977 -(181)^2]}$

or

$r=\frac{5804-1810}{\sqrt{[336-100][102788 -32761]}}=\frac{3994}{\sqrt{[236][70027]}}$

or

$r=\frac{3994}{4065.26408} =0.98247$

Therefore, the correlation coefficient r is, 0.98247 (Positive relationship)

6 0

3 years ago

Paul has $2,400 in a savings account earning 3.4% simple interest. How much more interest would he earn in 5 years if the intere

bija089 [108]

Amount using compound interest = 2400(1 + 0.034)^5 = 2400(1.034)^5 = 2400(1.1820) = $2,836.70

Amount using simple interest = 2400(1 + 5 x 0.034) = 2400(1 + 0.17) = 2400(1.17) = $2,808

Difference = $2,836.70 - $2,808 = $28.70

Therefore, <span>he will earn $28.70 more interest in 5 years if the interest were compounded annually</span> .

7 0

4 years ago

Choose true or false:

Shalnov [3]

Answer:

False.

Step-by-step explanation:

y+9=0

y=-9

hope you have a good day/night! :)

6 0

2 years ago

Susan rolled a die 1,086 times. Which of the following would be a good estimate of the number of times she rolled the number 3 o

adell [148]

Hello!

This is a problem about probability.

What we would first do is find the theoretical probability that Susan would roll the number 3 on a die.

Assuming that this is a fair six sided die, there is only one face with the number 3, and there are 6 sides, meaning that the probability that Susan rolls a 3 would be $\frac{1}{6}$ .

Now, Susan is rolling a die 1,086, meaning that we can divide this number by 6 to find the theoretical number of times that Susan would roll the number 3 on this die.

You should get 181 times, which would be a good estimate of how many times she could roll the number 3.

Hope this helps!

4 0

3 years ago