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notsponge [240]
3 years ago
11

Given a circle with an area of 25 pi in^2 What is the exact circumference?

Mathematics
1 answer:
Taya2010 [7]3 years ago
7 0

Answer:

31.4

Step-by-step explanation:

C = 2πr OR C = πd

But, we need to find r first.

A = \pi r^2\\25\pi = \pi r^2\\\sqrt{25} = \sqrt{r^2} \\r=5\\\\C=2\pi r\\C=2\pi (5)\\C= 10\pi \\C= 31.4

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We test for a hypothesized difference between two population means: H0: μ1 = μ2. The population standard deviations are unknown
Lina20 [59]

Answer:

The degrees of freedom associated with the critical value is 25.

Step-by-step explanation:

The number of values in the final calculation of a statistic that are free to vary is referred to as the degrees of freedom. That is, it is the number of independent ways by which a dynamic system can move, without disrupting any constraint imposed on it.

The degrees of freedom for the t-distribution is obtained by substituting the values of n1​ and n2​ in the degrees of freedom formula.

Degrees of freedom, df = n1​+n2​−2

                                       = 15+12−2=27−2=25​

Therefore, the degrees of freedom associated with the critical value is 25.

4 0
3 years ago
Pleaseee help me w dis asap!!
ikadub [295]

Answer:

x=2 f(x)=5-x

o≤x≤3  f(x)=x

2<x<3 f(x)=1

3<x≤5  f(x)=5-x

Step-by-step explanation:

6 0
3 years ago
A circular labyrinth has a circumference of 75 feet what is the distance from the outside edge of the labyrinth in to it center
Bas_tet [7]
The distance from the outside edge of a circle to its centre is given by its radius. The circumference of a circle is given by 2πr, thus if we know that this is equal to 75 feet and using π = 3.14, we get:

75 = 2*3.14*r
r = 11.942
Thus r = 12 ft (to the nearest foot)
6 0
3 years ago
One positive number is the square of another positive number. their sum is 132. find the numbers.
Jet001 [13]
X +x²= 132
x +x²-132= 132-132
x²+x -132 = 0
(x-11) (x+12) = 0
x-11 = 0 X+12=0
x-11+11 = 0+11 X+12-12=0-12
x =11 x= -12

Check
x +x²= 132 x +x²= 132
-12 +-12²= 132 11 +11²= 132
-12 + 144 = 132 11+ 121=132
132= 132 132=132

Since the problem says positive the answer is (11,121)
8 0
3 years ago
What expression is equivalent to -0.5x - 4?
Assoli18 [71]

Answer:

2x-32

Step-by-step explanation:

You would distribute the 4.

3 0
2 years ago
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