All categories

3 years ago

If a circle has a diameter of 21 inches, what is the circumference? (Use 22/7 for π.)

Mathematics

2 answers:

Marat540 [252]3 years ago

8 0

The answer is 66 hope this helps!! Have a great dayyyy!!

cricket20 [7]3 years ago

6 0

Answer: 66 is the circumference

Step-by-step explanation: Formula of circumference: 2 times pi times R

R is radius and Diameter is 2 times of R. Formula of circumference can also be: pi times R. 22/7 times 21 is 66.

You might be interested in

1. f(x) = -x + 6x-2<br><br> Find the vertex, y-intercept and x-intercept

expeople1 [14]

Answer:y intersept =-2

X interesept=2/5

Step-by-step explanation: let y=0

0=5x-2

2=5x

X=2/5

Let x=0

Y=-2

5 0

3 years ago

All models are reductions of the original object.<br> True<br> False

viktelen [127]

Answer:

true

Step-by-step explanation:

models are a smaller example of an original object

3 0

2 years ago

Read 2 more answers

Pls help i’ll give u a brainlest

Viefleur [7K]

Answer:

Step-by-step explanation:

The bases are both the same so it's 3*3 for both of them.

The sides are also the same so it's 3*4 for all four of them.

3*3+3*3+3*4+3*4+3*4+3*4

9+9+12+12+12+12

18+48

8 0

3 years ago

Read 2 more answers

Last time, one out of every 4 students in our class was absent. This time, after Jen came back, only one out of every 5 students

VMariaS [17]

Answer: There are 20 students and 4 students are not here today.

Step-by-step explanation:

If the number of students = 4

Let the number of students be 'x'.

Fraction of students absent = $\dfrac{x}{4}$

If the number of students = 5

Fraction of students absent = $\dfrac{x}{5}$

And Jen came back,

So, the fraction of student absent is also written as

$\dfrac{x}{4}-1$

According to question, it becomes,

$\dfrac{x}{5}=\dfrac{x}{4}-1\\\\\dfrac{x}{5}=\dfrac{x-4}{4}\\\\4x=5(x-4)\\\\4x=5x-20\\\\4x-5x=-20\\\\-x=-20\\\\x=20$

Hence, there are 20 students in our school.

And number of students are not here today is $\dfrac{20}{5}=4$

3 0

3 years ago

A cone has a radius of 4 units and a height of 6 units.

zubka84 [21]

Answer:

Volume of the cone: 32π cubed unit

Step-by-step explanation:

Volume of cone: V=1/3hπr²

1/3 x 6 x π x 4^2 = 32π

7 0

3 years ago

Read 2 more answers