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kobusy [5.1K]
3 years ago
5

Help me pleaseeeeeeeee

Mathematics
2 answers:
kirill [66]3 years ago
8 0

Answer:

B. 3.45

Step-by-step explanation:

The radius is half the diameter

Scrat [10]3 years ago
4 0

Answer:

B 3.45

Step-by-step explanation:

the radius is always diameter/2

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ماThe circumference of a circle is 7pie m.<br> What is the area of the circle?
Tresset [83]

Answer:

12.25\pi sq m

Step-by-step explanation:

if circumference is 7\pi then the diameter is 7

Area = \pir²

A = (3.5)²\pi

A = 12.25\pi

7 0
2 years ago
City A is 10 miles from city B and 5 miles from city C. Cities A, B, and C form a right triangle at A. A road connects cities B
laila [671]

Answer:

11.18 miles

Step-by-step explanation:

The sides of a right triangle a, b, c are related by the equation

a^2 + b^2 = c^2

where c is the longest side of the triangle

Hence given that A connects B and C directly and forms a right angle at A

5^2 + 10^2 = c^2

Where c is the length of the road

25 + 100 = c^2

125 = c^2

c = 125^1/2

= 11.18 miles

3 0
2 years ago
Please answer the question in the picture
GarryVolchara [31]

Answer:

D) (x+2) (x+2)  

Step-by-step explanation:

7 0
2 years ago
Read 2 more answers
Y=4x+8forx <br> Thank you if you can answer
yKpoI14uk [10]

Answer:

y=4x-8. y=4x−8 y = 4 x -

Step-by-step explanation:

I think is it

7 0
2 years ago
Read 2 more answers
A student wants to estimate the mean score of all college students for a particular exam. First use the range rule of thumb to m
Wewaii [24]

Answer:

See explanation below

<u>Step-by-step explanation:</u>

range = 2200 - 300 = 1900

To find standard deviation, we have:

standard deviation = range/4 = \frac{1900}{4} = 475

The range rule of thumb estimate for the standard deviation is 475

Given:

Standard deviation,\sigma = 475

Margin of Error, ME = 100

\alpha = 1 - 0.90 = 0.10

Za/2 = Z0.05 = 1.64

Find sample size, n:

n ≥ [Z_\alpha_/_2 * (\frac{\sigma}{ME})]^2

n ≥ [1.64 * (\frac{475}{100})]^2

n ≥ 60.68

≈ 61

Minimun sample size,n = 61

5 0
3 years ago
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