1answer.
Ask question
Login Signup
Ask question
All categories
  • English
  • Mathematics
  • Social Studies
  • Business
  • History
  • Health
  • Geography
  • Biology
  • Physics
  • Chemistry
  • Computers and Technology
  • Arts
  • World Languages
  • Spanish
  • French
  • German
  • Advanced Placement (AP)
  • SAT
  • Medicine
  • Law
  • Engineering
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

You might be interested in
Change 1/7 / 4/21 to a ratio?<br>​
sergeinik [125]

Answer:

3:4

Step-by-step explanation:

(1/7)/(4/21) = (1/7)×(21/4) = 3/4 = 3:4

6 0
3 years ago
Combine Like Terms: 9a + 6(10a+1) <br> 69a+1 <br> 75a <br> 30a+3<br> 69a+6
Oliga [24]

Answer:

69a+6

Step-by-step explanation:

Distribute the 6 over the (10a+1) then you get 60a+6. Add the 9a to the 60 giving u 69a then you have the 6 left over making the answer 69a+6

4 0
3 years ago
You earn $8.50 per hour. Then you receive a raise to $9.35 per hour. Find the percent increase. Then find your pay per hour if y
netineya [11]
Subtract $8.50 by $9.35
4 0
3 years ago
Help me please what do they mean?
gogolik [260]
Ask google it will help alot
6 0
3 years ago
PLEASE HELP ME!!
Ludmilka [50]

Answer:

<h2>The population will reach 1200 after about 2.8 years</h2>

Step-by-step explanation:

The question is incomplete. Here is the complete question.

The population of a certain species of bird in a region after t years can be modeled by the function P(t) = 1620/ 1+1.15e-0.42t , where t ≥ 0. When will the population reach 1,200?

According to question we are to calculate the time t that the population P(t) will reach 1200.To do this we will substitute P(t) = 1,200 into the equation and calculate for the time 't'.

Given;

P(t) = \frac{1620}{1+1.15e^{-0.42t} } \\\\at \ P(t)= 1200;\\\\1200 =  \frac{1620}{1+1.15e^{-0.42t} }\\\\cross\ multiplying\\\\1+1.15e^{-0.42t} = \frac{1620}{1200} \\\\1+1.15e^{-0.42t}  = 1.35\\\\1.15e^{-0.42t} = 1.35-1\\\\e^{-0.42t} = \frac{0.35}{1.15}\\ \\e^{-0.42t}  = 0.3043\\\\Taking \ ln\ of\ both\ sides\\\\lne^{-0.42t}  = ln0.3043\\\\-0.42t = -1.1897\\\\t = \frac{-1.1897}{-0.42} \\\\t = 2.8 years\\\\

The population will reach 1200 after about 2.8 years

6 0
3 years ago
Other questions:
  • Select the symbol that represents the phrase "at most."
    10·1 answer
  • Solve 3 to the -1 power times 5 to the -1 power.
    13·2 answers
  • A cone has a circular base with a diameter of 18 inches. the height of the cone is 40 inches. what is the approximate lateral ar
    14·2 answers
  • In a poll of registered voters​ nationwide, 43% of those polled blamed oil companies the most for the recent increase in gasolin
    11·2 answers
  • What is the quotient (3x^4-4x^2+8x-1) divided by (x-2)
    13·1 answer
  • 2 times the square rot of 3 divided by square root of 5 minus square root of 3
    14·1 answer
  • Convert the angle 260° to radians.<br> Express your answer exactly
    14·1 answer
  • Find the product pleeeaaassse... Im dead<br> (3x+5)(3x+6)
    5·2 answers
  • Can anyone know the answer please
    11·1 answer
  • in a gymnastics competition, Suzy scored 9.4, 8.7, and 9.5 and Tammy scored 9.5, 9.2 and 8.9. what were each of their average sc
    11·1 answer
Add answer
Login
Not registered? Fast signup
Signup
Login Signup
Ask question!