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Roman55 [17]
3 years ago
11

The area of a circle is approximately 379.94 square inches. What is the diameter of the circle? [Use 3.14 as an approximation fo

r pi.] a0 inches

Mathematics
2 answers:
VladimirAG [237]3 years ago
7 0
The diameter would be 21.99. 

avanturin [10]3 years ago
4 0

Answer:

Diameter=22 inches

Step-by-step explanation:

It is given that The area of a circle is approximately 379.94 square inches, then using the formula for the area of the circle, we get

A={\pi}r^2

Substituting the given values, we have

379.94={\pi}r^2

⇒379.94=3.14r^2

⇒\frac{379.94}{3.14}=r^2

⇒r^2=121

⇒r=11

Now, the diameter of the circle is given as:

D=2r

Putting the value of r, we have

D=2(11)

⇒D=22 inches

Thus, the diameter of the circle is 22 inches.

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What is the area of this composite shape
makvit [3.9K]

Answer:

51in

Step-by-step explanation:

you first have to find the area of the square by multiplying 6 and 7 which is 42. Then you have to find area of the triangle and the formula to do that is (length×width)÷2 . to find the length you have to subtract 7 from 13 which is 6 and the length you have to do 6-3 which is 3 then (6×3)÷2=9 and then you add the area of the square and the area of the triangle and get 42+9=51

6 0
3 years ago
Only number one please help ​
Alex73 [517]

Answer:

C) 75 + 50x = 25 + 70x

Step-by-step explanation:

ABC Tech:

$50 an hour. So,for x hours= 50 * x = 50x

Service charge = 75 + 50x

Tech Squad:

$70 an hour. So,for x hours= 70 * x = 70x

Service charge = 25 + 70x

C) 75 + 50x = 25 + 70x

50x - 70x = 25 - 75

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x = -50/-20

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6 0
3 years ago
If the area of Bianca’s rectangular backyard patio is represented by the expression x2−18x + 81, and the length of the patio is
frosja888 [35]

Answer:

a square backyard with width (x - 9)

Step-by-step explanation:

x²−18x + 81 = x² - (2 x 9) x + 9² = (x - 9)²

width = area / length = (x - 9)² / (x - 9) = x - 9

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This is a square backyard

4 0
3 years ago
Doctors can use radioactive chemicals to treat some forms of cancer. The half life of a certain chemical is 7 days. A patient re
RoseWind [281]

Answer:

5 millicuries

Step-by-step explanation:

Half life is 7 days which means it will be at 10 millicuries if we half that again for another 7 days then it will be 5.

6 0
3 years ago
4. This box plot shows the number of marks earned by the boys in a class test. What was the lower quartile? 5.This box plot show
suter [353]

Answer:

4-lower- 18

5-upper-29

6- range-56

Step-by-step explanation:

If you look up a completed box plot you can tell where lower and upper quartiles are. Range is found by Max-Min

Hope I helped...!

4 0
3 years ago
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