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
Rus_ich [418]
2 years ago
11

Diameter = 8 cm circumference =

Mathematics
2 answers:
adoni [48]2 years ago
7 0
The formula for circumference is π×r×r (r=radius) to get the radius you do diameter÷2= , in this case the radius is 4cm π×4×4= 50.26cm circumference
vivado [14]2 years ago
6 0


The formula to find circumference if you have diameter is:

pi multiplied by diameter.

So, 3.14*8= 25.12 cm

The circumference of the circle is 25.12 cm.

You might be interested in
You buy 1.86 pounds of ground beef 2,8
Mariana [72]
What is this question asking?
maybe try 3.87
7 0
3 years ago
Match the fraction/decimal with the percentage<br><br> MARKING BRIANIEST!
const2013 [10]

Yoink:

hey imma yoink your points  and not answer the question ok?

Jk:

jk, number 1 is b

number 2 is a

number 3 is d

and number 4 is c

7 0
2 years ago
A balloon rises to 100 feet in 4 minutes and 125 feet in 5 minutes. Write and solve an equation to find the distance the balloon
Margaret [11]

Answer:

A proportion is the name we give to a statement in which 2 ratios are equal. Proportions are built off of ratios. It is usually written in one of 2 ways

Step-by-step explanation:

7 0
2 years ago
Read 2 more answers
PLEASE HELP ASAP
neonofarm [45]

Answer:

9 Quarters

8 Dimes

3 Nickels

Step-by-step explanation:

We let the number of quarters be q

number of dimes be d

and

number of nickels be n

Since quarters are worth 0.25, dimes are worth 0.10 and nickels are worth 0.05 and total worth is 3.20, we can write an equation as:

0.25q + 0.10d + 0.05n = 3.20

Next,

3 times as many quarters as Nickels, we can write:

q = 3n

and

5 more dimes than nickel, we can write:

d = n + 5

Substituting these last 2 equations in the first and solving for n gives us:

0.25q + 0.10d + 0.05n = 3.20

0.25(3n) + 0.10(n+5) + 0.05n = 3.20

0.75n + 0.10n +0.5 + 0.05n = 3.20

0.9n = 2.70

n = 2.70/0.9 = 3

n = 3

We know q = 3n, so

q = 3(3) = 9

Also, we know d = n + 5, which means:

d = 3 + 5 = 8

Thus,

There are:

9 Quarters

8 Dimes

3 Nickels

5 0
3 years ago
A water balloon is 5 feet above the ground when Sally launches it into the air. Use the quadratic equation 0 = -t^2 + 4t + 5 to
rodikova [14]

Answer:

t=5\ sec

Step-by-step explanation:

we have

-t^{2} +4t+5=0

Solve the quadratic equation to find the zero's or x-intercepts

Remember that

The x-intercepts are the values of x when the value of y is equal to zero ( water balloon reach the ground)

we know that

The formula to solve a quadratic equation of the form ax^{2} +bx+c=0 is equal to

x=\frac{-b(+/-)\sqrt{b^{2}-4ac}} {2a}

in this problem we have

-t^{2} +4t+5=0

so

a=-1\\b=4\\c=5

substitute in the formula

t=\frac{-4(+/-)\sqrt{4^{2}-4(-1)(5)}} {2(-1)}

t=\frac{-4(+/-)\sqrt{36}} {-2}

t=\frac{-4(+/-)6} {-2}

t=\frac{-4(+)6} {-2}=-1

t=\frac{-4(-)6} {-2}=5

therefore

the solution is t=5\ sec

7 0
3 years ago
Read 2 more answers
Other questions:
  • The rectangles shown are similar. What is the value of X?<br><br> A. 7<br> B. 12<br> C. 8<br> D. 6
    8·1 answer
  • 5.Solve the quadratic equation.
    15·1 answer
  • A hospital gives a survey to all surgical patients asking them to rate the quality of their hospital experience. One month after
    5·1 answer
  • Cuál es la razon razón de triángulo a circulo
    10·1 answer
  • A cell phone provider offers a plan that costs ​$40 per month plus ​$0.20 per text message sent or received. A comparable plan c
    6·1 answer
  • 1. If 4.75x = 12.35, what is the value of x?
    15·1 answer
  • Find sin C, cos C, tan C. Express each ratio as a fraction. a=9, b=41, c=40
    15·1 answer
  • 3) The width is changed by a scale factor of . What is the new volume? 10 cm 15cm 5 cm
    10·1 answer
  • 75% of 48 show all the work
    12·2 answers
  • I need help with all of this
    5·2 answers
Add answer
Login
Not registered? Fast signup
Signup
Login Signup
Ask question!