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Oxana [17]
3 years ago
15

The circumference of a circle is 9π m. What is the area, in square meters? Express your answer in terms of π π

Mathematics
1 answer:
storchak [24]3 years ago
5 0

Answer:

A = 20.25π sq meters

Step-by-step explanation:

C = 2πr

9π = 2πr

divide π from each side to get:

9 = 2r

r = 9/2 or 4 1/2

A = πr²

A = π (4.5²)

A = 20.25π

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Answer:

169.56

Step-by-step explanation:

The formula for finding the volume of a cylinder is: πr²h

First step: Plug in the radius and height: π•3²•6

Second step: Plug 3.14 for π: 3.14•3²•6

Third step: Simplify the equation: 3.14•9•6

Fourth step: Multiple to get your final answer: 3.14•9=28.26•6= 169.56

8 0
3 years ago
Of the 600 sixth graders at Melville Middle School, 80% want more field trips. How many students want more field trips? Show you
DochEvi [55]

Answer:

480 students want more field trips.

60 students is 10%.

Step-by-step explanation:

There are 600 students, and 80% want more field trips.

80% of 600 is 0.8*600 = 8*60 = 480 students.

480 students want more field trips.

How many students is 10%​?

10% of 600 is 0.1*600 = 60*1 = 60

60 students is 10%.

7 0
3 years ago
Given Circle O with diameter CD C (-7. –4) and D (1,2) What is the length of the radius of Circle O?​
Lubov Fominskaja [6]

Answer:

Step-by-step explanation:

Radius = diameter ÷ 2

Diameter = distance between C and D

<em><u>Find the distance using distance formula</u></em>

<em><u /></em>Diameter, CD = \sqrt{(-7-1)^2 + (-4-2)^2}  = \sqrt{8^2 + 6^2} = \sqrt{100} = 10 \ units\\\\Therefore , radius = \frac{Diameter }{2} = 5 \ units<em><u /></em>

4 0
3 years ago
Find the value of Y, show work​
harina [27]

Answer:

13

Step-by-step explanation:

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