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
lianna [129]
3 years ago
8

the radius of wheel of a bicycle is 40 cm. taking pie =3.14, a)find tthe circumference of the wheel.b) find the distance covered

by the bicycle in 200 complete revolution of the wheel.please ans this question. i beg you
Mathematics
1 answer:
monitta3 years ago
6 0

Answer:

a)=251.2 cm    b)=50240 cm

Step-by-step explanation:

a) The formula for calculating the circumference of a circle is c=d*pie, where D is the diameter of the circle.

Therefore, C = 2 * 40 * 3.14 = 251.2 cm

b) The distance covered by 200 revolutions of the wheel is 200 times the circumference, 200*251.2=50240 cm.So to think about this we can assume that there is a point A on the wheel, the distance that point A travels when it rotates 200 times.

You might be interested in
For the diagram below, which equation is the correct use of the distance formula?
MrMuchimi

Answer:

????

Step-by-step explanation:

Where's the equation? diagram?

8 0
3 years ago
Read 2 more answers
Help I don’t know the answer I have tried solving this all kinds of different ways and it’s still wrong!
gogolik [260]

Answer:

24

Step-by-step explanation:

I think it's 24 I don't knowI say I think

7 0
3 years ago
Sara had some buns she sold 5/9 of them, if she has 128 buns left. How many bums did she have at first?
mina [271]

Step-by-step explanation:

Maybe she had

128 + 9 = 137 buns

7 0
3 years ago
Read 2 more answers
A private opinion poll is conducted for a politician to determine what proportion of the population favors adding more national
Ksju [112]

Answer:

n≅376

So sample size is 376.

Step-by-step explanation:

The formula we are going to use is:

n=pq(\frac{z_{\alpha/2}}{E})^{2}

where:

n is the sample size

p is the probability of favor

q is the probability of not in favor

E is the Margin of error

z is the distribution

α=1-0.98=0.02

α/2=0.01

From cumulative standard Normal Distribution

z_{\alpha/2}=2.326

p is taken 0.5 for least biased estimate, q=1-p=0.5

n=0.5*0.5(\frac{2.326}{0.06})^{2}\\n=375.71

n≅376

So sample size is 376

4 0
4 years ago
Find an equation equivalent to r = 10sin ø in rectangular coordinates.
kherson [118]

Answer: x^2 + y^2 -10y = 0

Step-by-step explanation:

Cartesian coordinates, also called the Rectangular coordinates, isdefined in terms of x and y. So, for the problem θ has to be eliminated or converted using basic foundations that are described by the unit circle and the right triangle trigonometry.

r= 10sin(θ)

Remember that:

x= r × cos(θ)

y= r × sin(θ)

r^2= x^2 + y^2

Multiply both sides of the equation by r. This will give:

r × r = 10r × sin(θ)

r^2 = 10r × sin(θ)

x^2 + y^2= 10r × sin(θ)

Because y= r × sin(θ), we can make a substitution. This will be:

x^2 + y^2= 10y

x^2 + y^2 -10y = 0

The above equation is the Rectangular coordinate equivalent to the given equation.

4 0
4 years ago
Other questions:
  • Using y=mx+b<br> Solve <br> 5y + 3x = 10
    15·1 answer
  • PLEASE HELP ASAP!!!!!! GivinG BRAINLIEST!!!
    8·1 answer
  • 32 equals 4 (x plus 40
    5·1 answer
  • Drag each tile to the correct box.
    6·1 answer
  • 2. Find the mean, median, mode and range of the following numbers.
    7·2 answers
  • What's the answer to r over 9 =-4
    10·1 answer
  • Will give brainlist.. thanks!
    12·2 answers
  • Consider quadrilateral ABCD shown.
    7·2 answers
  • Mrs. Peña is taking a group of 50 students on a field trip to the Georgia Aquarium. If 20 of the students are boys, what percent
    10·1 answer
  • Help its my birthday and i dont know the answer :(
    15·1 answer
Add answer
Login
Not registered? Fast signup
Signup
Login Signup
Ask question!