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ira [324]
3 years ago
9

Find the radius of a circle with area 42.7 units squared.

Mathematics
2 answers:
docker41 [41]3 years ago
6 0

Answer:

3.69

Step-by-step explanation:

A=\pi r^{2} is the formula to find the area of a circle. Input the numbers 42.7=(3.14)r^{2} and solve. It equals 3.68765, round to 2 decimal places making it 3.69.

lord [1]3 years ago
3 0
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In the fall of 2008, the Cleveland Plain Dealer identified 30 players to watch during the upcoming girls' high school basketball
Lady_Fox [76]

Answer:

Check the explanation

Step-by-step explanation:

a ) let u(1) is the population at a mean rate for the college students  who are of the male gender.

u(2) is the population mean for female college students

H0:u(1) = u(2)

Ha:u(1) \neq u(2 )

2 ) using minitab>stat>basic stat>two sample t

we have

Two-Sample T-Test and CI

Sample N Mean StDev SE Mean

1 29 70.50 2.90 0.54

2 30 69.60 3.30 0.60

Difference = μ (1) - μ (2)

Estimate for difference: 0.900

95% CI for difference: (-0.722, 2.522)

T-Test of difference = 0 (vs ≠): T-Value = 1.11 P-Value = 0.271 DF = 57

Both use Pooled StDev = 3.1099

degree of freedom = 57

here p value will be two sided

3 ) using the output

t value = 1.11

p value = 0.271

4 ) since p value is greater than 001 so we will accept the null hypothesis .

we will conclude that average of male and female college basketball players are same

6 0
3 years ago
On September 17, 2008, high tide in Portland was at midnight. The water level at high tide was 10.3 feet; later, at low tide, it
____ [38]
So the problem ask to calculate and formulate a function that could represent the water level in Portland if y is the water level and t is for time in hour so the possible answer would be that y=cosine(t)-0.3. I hope you are satisfied with my answer and feel free to ask for more
7 0
4 years ago
4x - 5y = 15 solve for y​
Wewaii [24]

Answer:

y=-\frac{15-4x}{5}

Step-by-step explanation:

4x-5y=15

Subtract 4x from both sides:

4x-5y-4x=15-4x

-5y=15-4x

Divide both sides by -5:

\frac{-5y}{-5}=\frac{15-4x}{-5}

y=-\frac{15-4x}{5}

7 0
3 years ago
Justin calculates the perimeter of a rectangle with a length of 2x-3 and width
n200080 [17]

Answer:

No

Step-by-step explanation:

No, because the perimeter of a rectangle is 2(x+y). Justin added the sides. Then he should have multiplied by 2 but he didn't so Justin is incorrect.    

Hope this helps plz mark brainliest :D

5 0
3 years ago
Read 2 more answers
Which expressions are equivalent to 4(x+1) + 7(x+3)? Select two answers.
Natalija [7]

Answer:

9(x+3) + 2(x+3) or 10(x+2) +(x+5)

Step-by-step explanation:

First you want to distribute the equation.

4(x+1) + 7(x+3) multiplied out is

4x + 4 + 7x + 21

Now we add like terms so it comes out to

11x + 25

Two expressions that can come out to equal 11x + 25 is. 9(x+3) + 2(x+3) or 10(x+2) +(x+5)

7 0
3 years ago
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