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

Mathematics

1 answer:

Whitepunk [10]3 years ago

8 0

Answer:

$A=81\pi\ m^{2}$

Step-by-step explanation:

Step 1

Find the radius of the circular cross section

we know that

The circumference is equal to

$C=2\pi r$

we have

$C=18\pi\ m$

substitute and solve for r

$18\pi=2\pi r$

simplify

$18=2 r$

$r=9\ m$

Step 2

Find the area of the circular cross section

The area of the circle is equal to

$A=\pi r^{2}$

we have

$r=9\ m$

substitute

$A=\pi (9)^{2}$

$A=81\pi\ m^{2}$

You might be interested in

The graphs of the function FF (left, in blue) and GG (right, in red) are below. Let P(x)=F(x)G(x)P(x)=F(x)G(x) and Q(x)=F(x)/G(x

romanna [79]

Let me go through with procedure for the first number, then the same would be applied to the next three numbers.

1. P'(1)
Since P(x) = F(x)G(x), then, P(1) = F(1)G(1). From the blue graph, F(1) = 2. From the red graph, G(1) = 3. Thus, P(1) = 2*3 = 6.

2. Q(1)
Q(1) = F(1) / G(1) = 2/3

3. P(6)
P(6) = F(6)G(6) = 5*3 = 15

4. Q(6)
Q(6) = F(6)/G(6) = 5/3

3 0

3 years ago

Pls help me ill give brainliest!!!!!!

Viefleur [7K]

Answer:

im your best friend

Step-by-step explanation:

5 0

3 years ago

What is the answer to 8s-11s+6

slega [8]

Answer: