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Wittaler [7]
4 years ago
8

A flexible wire is bent into a semicircular arc. ​The length of AB is 18 meters. ​ ​Find the length of the wire. Use 3.14 as an

approximation for π .
Mathematics
1 answer:
ohaa [14]4 years ago
7 0

Answer: 28.26 meters

Step-by-step explanation:

Hi, to answer this question we have to find the perimeter of the semicircle.

P = (2 π r ) /2 (perimeter of a circle divided by 2)

The length of AB is the diameter of the circle (18 meters)

Since

Diameter (d) = 2 radius (r)

Replacing with the value given:

18 =2r

18/2=r

9 =r

Back on the perimeter formula

P = (2 π r ) /2

Replacing with the values given

P = (2 x 3.14 x 9) /2

P = 28.26 meters

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Step-by-step explanation:

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8*9=72

96+54+90+71=312

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which of the following best explain whether 1/2 or 1 is the better estimate of 36/40? remeber that 20/40= 1/2 and 40/40=1​
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Step-by-step explanation:

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The food service manager conducted a random survey of students to determine their preference for new lunch menu items. Which of
gogolik [260]

Answer:

<u>Inferences A, B and C are correct.</u>

Complete question, data and inferences:

Item                         Number of students

Pizza                                   6

Salad Bar                           27

Pita Sandwiches                13

Burritos                             24

The food service manager conducted a random survey of students to determine their preference for new lunch menu items. Which of these inferences can be drawn from the manager’s data? Select all that apply.  

A. About twice as many students prefer salad bar as compared to pita sandwiches.  

B. About three-fourths of students prefer either salad bar or burritos.

C. About half as many students prefer pita sandwiches as compared to burritos.

D. Burritos are the most preferred item.

E. Twice as many students prefer pizza as compared to pita sandwiches.

Source:

Question that can be found at quizizz dot com. We can't copy and paste the exact URL because brainly will block it.

Step-by-step explanation:

A. About twice as many students prefer salad bar as compared to pita sandwiches.   True. Two times 13 is 26 and the number of students that prefer Salad Bar is 27.

B. About three-fourths of students prefer either salad bar or burritos.  True. 51 students are the 73% (about three-fourths of the students surveyed) of the total students surveyed, 70.

C. About half as many students prefer pita sandwiches as compared to burritos. True. 13 is almost the half of 24.

D. Burritos are the most preferred item.  False. Salad Bar is the most preferred item.

E. Twice as many students prefer pizza as compared to pita sandwiches.  False. It's the opposite actually; twice as many students prefer pita sandwiches as compared to pizza.

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3 years ago
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