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3 years ago

What is spqure root and how do i use it?are they any math apps or for Android?

1 answer:

6 0

The square root is a number multiplied by itself. the square root of 4 is 2, because 2 x 2 = 4. a standard calculator has the square root function. it looks like this: √

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Building engineer analyzes a concrete column with a circular cross section. The circumference of the column is 18 \pi18π18, pi m

Ksivusya [100]

the area A of the cross section of the column is $(81\pi )m^2$ .

<u>Step-by-step explanation:</u>

Here we have , building engineer analyzes a concrete column with a circular cross section. The circumference of the column is 18π, pi meters. We need to find What is the area A of the cross section of the column .Let's find out:

We know that , Circumference of circle = $2\pi r$

⇒ $Circumference = 2\pi r$

⇒ $18\pi= 2\pi r$

⇒ $\frac{18\pi}{2\pi }= \frac{2\pi r}{2\pi }$

⇒ $\frac{18\pi}{2\pi }=r$

⇒ $r=9$

We know that area of circle = $\pi r^2$

⇒ $Area= \pi r^2$

⇒ $Area= \pi 9^2$

⇒ $Area= 81\pi$

Therefore , the area A of the cross section of the column is $(81\pi )m^2$ .

3 0

3 years ago

There are a total of 84 students in the robotics club and the science club. The science club has 12 more students than the robot

Dafna11 [192]

Answer:

48 students in science

Step-by-step explanation:

Let r = students in robots club

s = students in science club

r+s = 84

s = r+12

Substitute the second equation into the first

r+(r+12) = 84

Combine like terms

2r+12 = 84

Subtract 12 from each side

2r = 84-12

2r = 72

Divide by 2

r = 72/2 = 36

We need to find s

s = r+12

s = 36+12

s = 48

There are 48 students in the science club

4 0

3 years ago

Read 2 more answers

What is the value of x in this triangle?

bekas [8.4K]

Answer:

A is the answer

Step-by-step explanation:

3*30 is 90 2*30 is 60 and x*30 is 30 which means 90+60+30 equals 180

5 0

3 years ago

Which table shows a proportional relationship between x and y?

S_A_V [24]

Answer:They are the same there just different variables

Step-by-step explanation:

6 0

3 years ago

(Need an answer fast.)

pogonyaev

The answer that you have derived is incorrect. Here is the correct way to solve it:
$-\frac{x}{2} \ \textless \ -1
$
We multiply -2 to both sides, which changes the signs.
$x\ \textgreater \ 2$
Therefore, the answer to your query is x > 2. Hope this helps and have a fantastic day!

6 0

3 years ago