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Sphinxa [80]
2 years ago
15

The radius of a circle is 7m , find its area in terms of π

Mathematics
2 answers:
dangina [55]2 years ago
8 0

Answer:

49π

Step-by-step explanation:

A = π r^{2}

A = π 7^{2}

A = 49π

For the one you put in the comment...

The radius of a circle is 19cm find its area in terms of π

A = π r^{2}

A = π 19^{2}

A = 361π

For the other one you put in the comment

The radius of a circle is 4 cm find its area in terms of π

A = π r^{2}

A = π 4^{2}

A = 16π

For the other one you put in the comment

The radius of a circle is 20 cm find its area in terms of π

A = π r^{2}

A = π 20^{2}

A = 400π

Hope this helped!

Have a supercalifragilisticexpialidocious day!

viktelen [127]2 years ago
3 0

HOPE THIS HELPS

CAN U PLEASE GIVE ME BRAINLIEST

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There are 400 students in a school. Fifty five percent are girls. How many boys are there?
ki77a [65]
1) 55% is girls, then 
100-55=45% is boys.

2) 45%=0.45                                     or  2) 400 ----100%
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The independent-samples t testResearch Scenario: A forensic psychologist has developed a new program that teaches empathy and po
8_murik_8 [283]

Answer:

Step-by-step explanation:

Hello!

The researcher developed a treatment to teach social skills to youth offenders. To test if the treatment is effective in increasing empathy compared to the standard treatment she randomly selected a group of 9 offenders and applied the new treatment and to another group of 9 randomly selected youth offenders, she applied the standard treatment. (Note: the data corresponds to two samples of 9 units each, so I've used those sizes to conduct the test)

At the end of the treatment, she administers BES to measure their empathy levels. Her claim is that the offenders that received the new treatment will have higher BES scores than those who received the standard treatment.

1) Using the records obtained for both groups, she  intends to conduct an independent t-test to analyze her claim.

X₁: BES results of a youth offender treated with the new treatment.

X₂: BES results of a youth offender treated with the standard treatment.

H₀: μ₁ = μ₂

H₁: μ₁ ≠ μ₂

α:0.05

test statistic

t_{H_0}= -0.32

p-value: 0.7517

The p-value is greater than the significance level so the decision is to not reject the null hypothesis. This means that at a 5% significance level you can conclude that there is no difference between the mean BES scores of the youth offenders treated with the new treatment and the mean BES score of  the youth offenders treated with the standard treatment. The new treatment doesn't increase the levels of social empathy of the youth offenders.

I hope this helps

(Box plot in attachment)

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3 years ago
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Ilya [14]
1=5-4 because you have to substitute x and y (x,y) or (5,1)
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