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
lana [24]
3 years ago
7

A building engineer analyzes a concrete column with a circular cross section. The circumference of the column is 18π meters. Wha

t is the area of the cross section?
Mathematics
1 answer:
Whitepunk [10]3 years ago
7 0
Answer: 81pi square meters

--------------------------------------------------------

Work Shown

C = 18pi is the given circumference
d = diameter which is unknown

C = pi*d
18pi = pi*d
18 = d
d = 18

The diameter is 18 meters.
Half of this is the radius r = d/2 = 18/2 = 9
The radius is 9 meters

Use the value of r to find the area of the circle
A = pi*r^2
A = pi*9^2
A = pi*81
A = 81pi

The area of the circular cross section is 81pi square meters

You might be interested in
Which multiplication problem is equivalent to 338÷34?
gtnhenbr [62]

Answer:

What are the options?

Step-by-step explanation:

7 0
3 years ago
20. Solve 4 - 2(b - 6) = 12<br><br>b = 2<br><br>b = 12<br><br>b = -2<br><br>b = -10​
Maurinko [17]

Answer:

<h2>b=2</h2>

Option A is the correct option.

Solution,

4 - 2(b - 6) = 12 \\ or \: 4 - 2b + 12 = 12 \\ or \: 4 + 12 - 2b = 12 \\ or \: 16 - 2b = 12 \\ or \:  - 2b = 12 - 16 \\ or \:  - 2b = -  4 \\ or \: b =  \frac{ - 4}{ - 2}  \\ b = 2

Hope this helps...

Good luck on your assignment..

3 0
3 years ago
Read 2 more answers
I stayed up all night trying to figure out this question but I just can’t
Vilka [71]

Answer:

from what we're given on the drawing, ac and pt are congruent

and from the question format, ab is equal to pq, ac is equal to pr

8 0
3 years ago
Beth estimates her expenditures for transportation as follows: May, $91; June, $122; July $478. What is her estimated average mo
kipiarov [429]

Answer:

around 230

Step-by-step explanation:

91+122+478=691

691÷3= 230.33333333

4 0
3 years ago
1<br> 2<br> 3<br> 4<br> Pls help meee!!!
Rus_ich [418]

Answer:x=2

Step-by-step explanation:

3 0
3 years ago
Other questions:
  • You drive a car that holds 15 gallons of gasoline. Your car uses 0.03 gallons per mile. Which equation best represents this info
    11·2 answers
  • What
    11·1 answer
  • Solve the equation graphically by finding intersections.<br> |2x+1|=17<br> X=
    5·1 answer
  • Can you subtract a 2x3 and a 2x2 matrix
    12·1 answer
  • A number is a palindrome
    15·1 answer
  • Name the constant of proportionality for the equation below:<br><br><br><br><br> y = -2/3 x
    13·1 answer
  • PLEASE HELP ME HURRY
    14·1 answer
  • Uehehejjdjdjejjejejjdjdjejejejejejjejejejeejjd
    8·2 answers
  • F(x)= x^2 +4 +3 /x^2-x-2 not continuous at x = -1.
    9·1 answer
  • A dog is chained to a pole. If the dog can run within an area of 380 ft.², how long is the chain?
    7·1 answer
Add answer
Login
Not registered? Fast signup
Signup
Login Signup
Ask question!